Malicious PDF — malware analysis report

Static analysis result for SHA-256 002e8394772b13c1…

MALICIOUS

PDF

88.7 KB Created: 2021-07-22 04:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4bcf4b0a03e5a6b00eb758ff0fbd09d0 SHA-1: 3d2b0fa1304c517fd741935fe2dc368cb0bdeab5 SHA-256: 002e8394772b13c1d2a98d4fd9f4f91ca9dedf2188a103668b9cf1de38a08bbe
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of multiple unknown URLs points towards a broad distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 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://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/0fe271efb2b5f575c2b5dcb22bc57d0b/rozewenamefitufosimo.pdf In PDF document text
    • https://dovolena-jiznicechy.cz/uploads/fudegutapoletofisela.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/61295354998.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/792275b930a7cc3fa3b2f592686eaad9/begafibabuxa.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079438b67156---jezaranasudafibobivosa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb480eed14---fugiru.pdfIn PDF document text
    • http://skupka54.ru/upload/m/gisuxudofutigetupinotoxa.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2223ee9a5d---vanufovifog.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/19270985344.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160831b26c7022---98311158643.pdfIn PDF document text
    • http://vizesblokk.hu/files/file/fezixufazotijakinugewoj.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607742cf9218c---nifoxesimubafurelagapopi.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed2752f743---gikatu.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160947612a6459---25266223345.pdfIn PDF document text
    • https://www.disbel.es//ckfinder/userfiles/files/19608981213.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/74447157816.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/8c7a0bfc8f0ad5e836e1f79c1b476785/bozovozejalamasadumitoti.pdfIn PDF document text
    • http://funperm.ru/content/file/67581117309.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/fimirodagigum.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/tuxavotikewogudi.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/81788dc0a2549010d5d4d58c31c74a6c/82580483387.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cbbe44bbf18---51741238815.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=mildly+enlarged+right+ventriclePDF link annotation
    • 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_off0000fa63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA63 10536 bytes
SHA-256: 95867716c1839416ccf146a38beecd0b737bb937ac6c1255a7f56474218e5f19
font_01_sfnt_off00011217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11217 16452 bytes
SHA-256: 29989cc2c735742873372f2df9b263c0bcfe0ddb49a8eaf800f5441149157f42
font_02_sfnt_off00013cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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