Malicious PDF — malware analysis report

Static analysis result for SHA-256 c01c10cd2f9de993…

MALICIOUS

PDF

68.8 KB Created: 2021-03-30 02:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 34e610ee1f6473262ee8c534d4ccb4e5 SHA-1: 98bb2ec20c5c1a49812c9884409c38bc6a730490 SHA-256: c01c10cd2f9de9937d3a4bd4e26e970dfbb699e42587fd18bd0bd18259137c9c
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://jacksth.ru/wix?keyword=stealth+hunter+3+unblocked PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470977/normal_5feee22d90b00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376602/normal_605192193b9c7.pdfIn PDF document text
    • http://avlto.best/xerulutuxojovumeduscyyak.pdfIn PDF document text
    • http://nufivuzelikonax.getenjoyment.net/padesidadebumizirus.pdfIn PDF document text
    • http://santecmb-sarl.com/48108873469fj8ci.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_60196bb2e187b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453335/normal_604afb0309245.pdfIn PDF document text
    • http://sexesex.site/xovanudilukazafudofubamual72p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404488/normal_5fc986d54e623.pdfIn PDF document text
    • http://kinokaiff.space/rinnai_gas_heaters_for_sale_perthltyp9.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/53140033034.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/23914839220.pdfIn PDF document text
    • http://reabook.online/pusonanoxularurex90xx.pdfIn PDF document text
    • http://xevamoz.mygamesonline.org/66415919199.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/la_vie_dun_simplej5we2.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/rujagud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422378/normal_5ff22bdf6544a.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/1a647029-8b8d-4001-a0bb-90fd90a12a24/oracle_sql_timestamp_date_only.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a54c2f-25c9-415c-a5fc-b5afbee34aa4/iron_man_2_screenplay_justin_theroux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a77aff-b284-4aa1-ad45-dc094b231d94/32105155174.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_off0000d172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD172 5320 bytes
SHA-256: dda9854cbf0ff20e9319fefa6d49a0cf7835417ece07ca239f6b57fbc8613f51
font_01_sfnt_off0000e378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE378 10012 bytes
SHA-256: ac78ac0daff0bf15643e7ded60a1e55ffb194eb6cb5ed209a1be22f5a4d37d00

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