Malicious PDF — malware analysis report

Static analysis result for SHA-256 cede2c51bf8f7ded…

MALICIOUS

PDF

91.6 KB Created: 2021-08-21 04:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1f99bc4d481dda412541933bf97fb6f2 SHA-1: 32293331f7b4ff10fd4968cc3bd79fbf7ee70bc6 SHA-256: cede2c51bf8f7dedf98ba5094c1aaada4ad72165923711ce0894f87538daa900
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress installations, suggesting a phishing or malware distribution campaign. The presence of multiple external URIs and link farms indicates an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://irlanc.ru/uplcv?utm_term=cr%C3%B3nica+de+una+muerte+anunciada+pel%C3%ADcula+completa+1987 PDF link annotation
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/d253d796e70c9c2b502afd15f97c07b4/tamezopeme.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/hpla2jf5m086i7peibod0j3bve/70573168144.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/julalobapedisakebokosuwik.pdfIn PDF document text
    • http://highgaincomposites.com/img/file/20217694153.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/sivibokab.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/b1d0465047b0c790b696e890351ce9cc/81842322263.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/bf7c33099f449a49876e97d20506415e/55565775208.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/99467159691.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/20857096312.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/38876932154.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a4777c57495---zovigokadatuk.pdfPDF link annotation
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/d83hupef3luad5m5s7419691bh/48719973229.pdfIn PDF document text
    • http://jfhcoaching.com/userfiles/files/6616921527.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/84676325771.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3e324c45d---36706880876.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d5e2068858a---15071177118.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1610c1602adc4c---nawuxesodesujujojazi.pdfIn PDF document text
    • https://m3csrl.com/file/warediliwewozupolu.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/82bcb0e4fb78d70e066f4e52643e8fce/divelosozegipu.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/4ed4cff30f723b55c6865d4ec534bcab/97636483567.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d53073a33c---wivafuguloki.pdfIn PDF document text
    • https://aksusu.com/upload/files/fubuwimiletugufuveji.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/70680212738.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/af07e105c77d3166b9143ea8545bced8/73932736634.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64B 20656 bytes
SHA-256: 2a0aaadf254c986cc5f5258404d45fdafee5988690240147ede5111fce064cc6
font_01_sfnt_off000129d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141EF 11316 bytes
SHA-256: f3218eaf4f5fb897d299a7b25b8b016efd2e9b6a32cf250fee69ddb3048953e3

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