Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b8ad9f285c5d7a…

MALICIOUS

PDF

69.3 KB Created: 2021-05-14 06:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c865fa8033917251eb432b6ea731a589 SHA-1: 7439534a43cf58d77bf394e634e5890cd1abc49f SHA-256: f7b8ad9f285c5d7a3929906399eaa3307234946774cc567163d6059c9df7064d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 5

  • 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 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://dafemum.ru/strik?utm_term=dell+s2715h+27+review PDF link annotation
    • http://cmb-eco.com/lesiwovebenidiru0oxut.pdfIn PDF document text
    • http://igrarazuma.info/tenenotikefemabi0r15y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379626/normal_5ff759dbc8c99.pdfIn PDF document text
    • http://zafenoro.scienceontheweb.net/71225028021.pdfIn PDF document text
    • http://premium-cinema.com/what_are_the_4_contingency_leadership_theories4q7em.pdfIn PDF document text
    • http://blog-uniswap.org/audit_report_writing_coursee4z3u.pdfIn PDF document text
    • http://megatorg.ru/752888177913gtxz.pdfIn PDF document text
    • http://casserlabs.xyz/libro_metafisica_4_en_1_florence_scovel_shinn_gratis5nmp5.pdfIn PDF document text
    • http://trells.space/bifatakagidanopamanisy8z9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404105/normal_603f3e1951277.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453721/normal_604eb9ea7aa7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481662/normal_5fc76337d361e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://binalidagu.epizy.com/50093575585.pdfIn PDF document text
    • http://fogepejil.epizy.com/kolizuzexigulufex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc9bade-08ff-4c38-9335-1691c399aa9a/pidifemubomojopediwaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e62eb28d-e71a-46d8-bc24-166068f3536b/yongnuo_yn_560_iii_vs_canon_430ex_ii.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/paburusegopa.pdfIn PDF document text
    • http://kigizeme.epizy.com/kifij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02508c67-79a9-4957-b06e-6d32afe28755/al_falah_online_quran_academy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eb8019b-44d4-4690-9e02-201d0ca40ee9/41527648427.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC833 5104 bytes
SHA-256: 893b40f61cab6fd020d21d4e8f988fb8cddab1f17d9e75379d5a7682ef22573d
font_01_sfnt_off0000d9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B6 16916 bytes
SHA-256: d9ee5f4c93073682d0df6153b9361c9f7a798b8f2bdf3b33f0c80e524fd07474

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