Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f905588aac7abc8…

MALICIOUS

PDF

110.0 KB Created: 2020-11-29 10:01:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c58d54080dcc56f617478e7456d7920c SHA-1: 3491d53f38ac2c525b395e97e70a29f5ec39769f SHA-256: 6f905588aac7abc86665b66066e6373c3f618b6804178a089c2b641d0576a2ef
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://traffset.ru/123?utm_term=instruction+manual+for+sony+dsc+hx400v PDF link annotation
    • https://diveziriluro.weebly.com/uploads/1/3/4/4/134447321/6317913.pdfIn PDF document text
    • https://mivijupa.weebly.com/uploads/1/3/4/5/134578330/b13a1bd.pdfIn PDF document text
    • https://gasipepimajut.weebly.com/uploads/1/3/4/3/134367512/libidufo.pdfIn PDF document text
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/tuluwe_pukixideti.pdfIn PDF document text
    • https://bawimivumo.weebly.com/uploads/1/3/4/6/134609907/6949253.pdfIn PDF document text
    • https://lituveso.weebly.com/uploads/1/3/4/3/134362288/novakejiwukos.pdfIn PDF document text
    • https://xujebope.weebly.com/uploads/1/3/4/0/134018561/c2cfc106ba4bc3.pdfIn PDF document text
    • https://lepuxodotedob.weebly.com/uploads/1/3/4/5/134507089/busabakinufa-nemilude.pdfIn PDF document text
    • https://digufotunu.weebly.com/uploads/1/3/4/2/134266503/mijodiwiko-sosiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7c1b362c-606b-424d-963a-90a50bc4d022/lawopijexoguxokazaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e628660-bd20-4d0c-a022-54cf47c36d66/mexico_the_cookbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dac225d4-192c-472f-9ab3-2ca84d38e8d7/ropabaziwepeviluvuzawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cc04ee1-0aea-473b-b12e-3449986f7f54/unblocked_games_76_at_school_fnaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f364432-b6b0-4b0d-bca4-110dfab164fd/karla_guerra_de_chistes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a1f418-122a-4764-82a1-ab0ed72e79c9/jukovitut.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001524e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1524E 3220 bytes
SHA-256: d79750bb2f20a3ba9bb930b6b4b31105ffbe3c34e59909da052283356c1a5161
font_01_sfnt_off00015dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DC4 5424 bytes
SHA-256: 07bd3000afacfad478e520d5ff763a417ebe88d0bc54a6e366828c986e66672c
font_02_sfnt_off00017003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17003 13768 bytes
SHA-256: f8ecc0810211c88feae6b0fd446341d3040adabd3f9c19fcd6969f1ef2486465
font_03_sfnt_off00019a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A24 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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