Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d69da0736ae8ce6…

MALICIOUS

PDF

69.6 KB Created: 2021-03-23 17:13:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ff650e8f254a720d65baa99c2ffef5bc SHA-1: 84deb117dff1a23abe19c21fd2dfc77cad742cf8 SHA-256: 6d69da0736ae8ce69732e05b5d02410c5f5991b2f6d0fd65770da5f774326d76
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 0.9998

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://dugedepap.ru/wix?keyword=origami+turkey+bookmark PDF link annotation
    • http://supariwepexafat.mywebcommunity.org/kogose.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409103/normal_6002b95ce5d30.pdfIn PDF document text
    • http://podarokinsta365.site/cabal_online_patchj6fhp.pdfIn PDF document text
    • http://wabiferofuvud.mygamesonline.org/how_to_buy_a_car_privately_in_queensland.pdfIn PDF document text
    • https://zibaxewax.weebly.com/uploads/1/3/4/6/134699960/lunepevugodata.pdfIn PDF document text
    • http://movizopolu.medianewsonline.com/sad_cello_sheet_music.pdfIn PDF document text
    • https://figapizezedop.weebly.com/uploads/1/3/4/3/134364787/ddbc8cc1c08cb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419225/normal_603a1fcd41207.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/maths_textbook_for_class_7_ncert.pdfIn PDF document text
    • http://ig-mediateam.net/rejipajiligyt7kj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_0529d594f4384e47b0a5ffc0f62cf3fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/aortic_stenosis_surgery_guidelines.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/30789722145.pdfIn PDF document text
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_348707c4d28d4c7fac4d1e5851096205.pdf?index=trueIn PDF document text
    • https://af431a04-9ebc-4ea4-a98d-45e4ffbfad14.filesusr.com/ugd/485053_e858412109fe4386ad49c3b70681bb2a.pdf?index=trueIn PDF document text
    • https://ab0007c4-58ca-4db2-ab23-686bae4d53c1.filesusr.com/ugd/8bf248_6562b84fa31542938b7d8cd0743757dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/fikezagojan.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_off0000d44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44A 5128 bytes
SHA-256: 60e9cea98fb9f8cfde5d0f589f2b97e766aaa9b2f470bf9dd84867ce51765b33
font_01_sfnt_off0000e5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B4 10484 bytes
SHA-256: 33314c10d71b2cf4fc7b1f9b8d0160bc4b1ab2135982b1c99d28a5852fb8406e

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