Malicious PDF — malware analysis report

Static analysis result for SHA-256 f254b1450c2e7441…

MALICIOUS

PDF

93.1 KB Created: 2021-09-08 08:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 45a523e7f912494442b3e7736a967e9c SHA-1: 7d0cea0750a2a4731fc33756a329878abaa8eb01 SHA-256: f254b1450c2e744122814e999fbba2ca9934b4b871c05478a4357ae95bb493ad
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. One heuristic specifically flags a link farm designed for SEO poisoning, aiming to trick users searching for legitimate software into downloading malware. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing lure for a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ketchas.ru/uplcv?utm_term=download+adobe+pdf+reader+for+pc+free PDF link annotation
    • https://consurs.ro/ckfinder/userfiles/files/vowamulagofuxatujaremomi.pdfIn PDF document text
    • https://comfort8889.com/upload/files/pazuwafukonimosazeb.pdfIn PDF document text
    • https://cantellodetersiviprofessionali.it/uploads/file/61037708186.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a301f943455---49884329529.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a903c83e2b4---budewanebemuzirobulifefub.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608fcc0ed2cb9---7310736827.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/rehnno3gm06lukfbladnfaerv3/13326684836.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/78342934188.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/2ab3fbe08b0c57f4536ee6d9fc20be5c/wiled.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/l3tthhlnsgahgocgqa3n9ahad7/rofunonapujuwexabofab.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3862de19e---xerebini.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/6333408044.pdfIn PDF document text
    • http://skupka23.ru/upload/m/bemesigijogujusax.pdfIn PDF document text
    • https://thehero88vip.com/ckfinder/images_store/files/divur.pdfIn PDF document text
    • https://ms02bet.com/contents/files/65023243365.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607018cdd8d16---biwitakexijedadegamuw.pdfIn PDF document text
    • https://priscar.com/documents/files/wopulovonosopebezeke.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/gsfmi6acfvc7hi3hrp01d5jd8a/najora.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8438791a0c---2120093068.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/df0e63c846e4a5382686fafdc49726f9/lotovotev.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160c3af264c08e---48058791267.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af49afad1fa---foripejamogonuveb.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1610a76756faad---95855039634.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/tuvikofesolefit.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B1 17036 bytes
SHA-256: 7b60ed016d61c82d321f942dcc7f9224bf62e68fa8dd4b64e6a6f335674ee9fa
font_02_sfnt_off000109ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CA 10480 bytes
SHA-256: 39ba77c66069b0e11f8bc69e8d3ebbccb222d8af109acd2f4a4652dc3ed96844
font_03_sfnt_off00012186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12186 24020 bytes
SHA-256: 44102585faa1e743aa223fe30fe667fb459e1fe9d0807356b38591755c2074f1
font_04_sfnt_off00015d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D12 1732 bytes
SHA-256: cc9aa9d10d6f336345dda96c648cf1cebe6fdaa1cf59576acfec5bb48f04b3bd

Open this report in the interactive analyzer, or submit your own file for analysis.