Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9b0154bf203c91…

MALICIOUS

PDF

77.6 KB Created: 2021-05-19 21:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 597723124c5a1467949cfad62d97f239 SHA-1: 884f9b94769fdb7f371bbdc629e1022e4638e83c SHA-256: 7d9b0154bf203c91f75823fbd2e6a723baabf28e11de0da315c5954a6961777e
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://soxebez.ru/strik?utm_term=adobe+photoshop+cs6+t%25C3%25BCrk%25C3%25A7e+full+indir+gezginler PDF link annotation
    • https://tomoniwibisuxis.weebly.com/uploads/1/3/5/9/135961627/2201691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_6050671bd8409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389106/normal_601591d56c84c.pdfIn PDF document text
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/c7afd.pdfIn PDF document text
    • https://bexaxasoves.weebly.com/uploads/1/3/1/4/131438242/ponamufawodadeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449177/normal_6019f737b6dc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413578/normal_602d2caf326f0.pdfIn PDF document text
    • https://sugodaxekot.weebly.com/uploads/1/3/1/8/131872070/8515537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416301/normal_6057c30e36401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_6066503a684ae.pdfIn PDF document text
    • https://gekaketiba.weebly.com/uploads/1/3/1/4/131455198/5989971.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/how_to_cite_an_online_newspaper_article_in_apa_6th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d21265bb-fdc5-41b7-a554-cad4d1adbadb/gopro_hero4_silver_iphone_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67677b3b-6546-4194-8baf-02a580b32ff6/how_do_you_stop_smoking_when_pregnant.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/bloodhound_dog_breed_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c539bcf-cdda-473b-93c7-6187cbe0ccd9/97942508065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f98adb2d-33bc-44e6-9aef-691104efc88d/the_guilty_one_book_club_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/267f2f52-6160-4df8-8406-5c66b94057a5/lafazodawadigudotovew.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/78741060741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e8ecb63-2f8b-474b-9070-23c5afa45124/81941243603.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_off0000ef1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1B 5904 bytes
SHA-256: 3e4399042c710d0cb55b9a27af0cd7ac969ad72f7b88239ed4576caff5dd08f1
font_01_sfnt_off000102bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BF 10408 bytes
SHA-256: 77bb7bb64216bcdf367b4736c40079b0f7d62939dbf277c951e620c3b384687c

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