Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2662e12475a65fe…

MALICIOUS

PDF

91.3 KB Created: 2021-06-03 22:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8205536f9a7e4f6dc204eb3d0a855562 SHA-1: ceaba32e4e02f17aa9453489ee5ff32e274c7b4e SHA-256: e2662e12475a65feea84c7fbe0fcec9c639dbc4b29cd9bbb5f718086bff3d2ee
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, likely for phishing or SEO spam. The document body, though heavily obfuscated, suggests a lure related to product instructions, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://huntic.ru/pbw?utm_term=chicco+keyfit+30+infant+insert+washing+instructions PDF link annotation
    • https://tarebizadutobi.weebly.com/uploads/1/3/4/3/134310067/d4299e11203.pdfIn PDF document text
    • https://vavagufone.weebly.com/uploads/1/3/4/3/134345741/7988062.pdfIn PDF document text
    • https://jutokikifugata.weebly.com/uploads/1/3/1/0/131070124/2638448.pdfIn PDF document text
    • https://karujuxu.weebly.com/uploads/1/3/4/7/134717714/6557002.pdfIn PDF document text
    • https://lovuzuligo.weebly.com/uploads/1/3/5/3/135315796/liziwawodonisen-wabiduzobu-xisajawegukib-xinufad.pdfIn PDF document text
    • https://jivarogogujuno.weebly.com/uploads/1/3/4/5/134513891/novezaxujip-burag-wiwileveno.pdfIn PDF document text
    • https://kewekekonuv.weebly.com/uploads/1/3/4/7/134732265/7ba88c0920c.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/5a50335e-064b-4b52-8b45-6f140857956a/negokenabenumupude.pdfIn PDF document text
    • http://tazijebep.pbworks.com/w/file/fetch/144420324/52528226759.pdfIn PDF document text
    • http://jifesepapo.pbworks.com/f/48546781397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8499fee2-3c8d-4e57-bcf7-d30f3818b66c/los_juegos_del_hambre_2_completa_espaol.pdfIn PDF document text
    • http://naxenuve.pbworks.com/w/file/fetch/144448440/qual__a_raiz_quadrada_de_24.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69fe25ee-faf7-4235-97c2-9def4eb8d48a/94907677548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb6eb77c-5c6f-4468-866a-130e330b1891/chains_book_summary_chapters.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123FE 5580 bytes
SHA-256: e61f69b450c63db1b8e05df47d06da97f7c3be8b70926d088d5a25d93b3f1f75
font_01_sfnt_off00013714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13714 12144 bytes
SHA-256: 65f28a2490d84ed123c66035e28e9e3d3478e7af88f91f1ec349f864a5fd2e77

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