Malicious PDF — malware analysis report

Static analysis result for SHA-256 382766a05c2a4b85…

MALICIOUS

PDF

71.8 KB Created: 2021-01-01 07:53:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3fd4a5e1dbfeb61a587899a1aee6629c SHA-1: 39258096d5adfbe9efaacf2a2f41ce1bcf399fa9 SHA-256: 382766a05c2a4b8544b2f21df3d1420c3e9e95ae983001652a32447699e7262a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/strik?utm_term=ultimate+car+driving+simulator+gameplay PDF link annotation
    • https://pirovosarelivo.weebly.com/uploads/1/3/1/4/131406751/8291784.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/7697904.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/A3lidNp/game_developer_tycoon_tips.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/XjehdEP/44832563406.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/jiuwEia/41440406269.pdfIn PDF document text
    • https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/buxakevinil-leponibexemak-repoxilevaxu.pdfIn PDF document text
    • https://mofivekirupu.weebly.com/uploads/1/3/2/7/132740685/6091689.pdfIn PDF document text
    • https://zofigaxukinepir.weebly.com/uploads/1/3/4/2/134235574/xelugaviloxeni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a53b98-44a2-466e-a72a-25d1456ca960/eimacs_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/pivunolaferono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f8e33b-715b-457e-96ce-ed514904e4e6/somagilexitutedomixara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c06c78b7-29de-4c33-b8dc-73161e545da5/narid.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CA 5544 bytes
SHA-256: 233831f874a2cccb72b716fc7b9829fc9b31a911c05567549f57dc44abab917d
font_01_sfnt_off0000da99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA99 10032 bytes
SHA-256: d6e22ba893e82302e3cc2e7198c1faba5d30bc45688f6e9897b28052f0980ffd
font_02_sfnt_off0000fd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3B 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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