Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0328afc27e652b…

MALICIOUS

PDF

83.9 KB Created: 2020-12-06 05:22:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2b33f4197b59b8afc61e20e4203bccbb SHA-1: b01d737bbc9c7026f6189df611571dc9d2cc0d12 SHA-256: 7d0328afc27e652ba5880b57428a2eb897041f6f471e839c8b1a196616f27fa3
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/strik?utm_term=packages+for+descriptive+statistics+in+r PDF link annotation
    • https://kexawugidatenak.weebly.com/uploads/1/3/4/3/134338825/duwifu_pevufolewo_jureluv_mogikan.pdfIn PDF document text
    • https://sewokowoxukipa.weebly.com/uploads/1/3/4/8/134846336/a3298e88.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/946536.pdfIn PDF document text
    • https://vozexipazaxa.weebly.com/uploads/1/3/4/4/134444785/7659420.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/15683e4dc6b7.pdfIn PDF document text
    • https://sudateneturoxa.weebly.com/uploads/1/3/4/3/134322726/sizaseze.pdfIn PDF document text
    • https://rowofijiguni.weebly.com/uploads/1/3/4/4/134479741/5494059.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/e3eb136c-4a8b-4645-b796-6662a0fd24c9/sobaferawezum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4174263-3354-498b-b531-c55a61929f1f/ms_for_men.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9254b13-85b9-4426-8514-05dc07fd0822/13707488783.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/personal_pronouns_british_council.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc283e75bcb0228a28ca719/t/5fc522def8cdb769c687d45f/1606755038383/hatchet_study_guide_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fa909b1-dc1b-4f0b-9492-33d2e3965e7c/zovupafusevo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ecedbf71053ccb1052a5/t/5fc17202e18c5c478e326e0d/1606513154710/25509148220.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02E 5416 bytes
SHA-256: 6f61b57ccbe10e358bbb2c465ec8371227889d5e83fc604f47e5335de1c79b73
font_01_sfnt_off000102b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B6 12932 bytes
SHA-256: 4dbcd04ee746aebb29a03db1f5b64ee36fc74b506198c0cc6a5182288df1509d
font_02_sfnt_off00012d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1C 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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