Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a850a2f60660f4…

MALICIOUS

PDF

62.7 KB Created: 2020-12-01 04:33:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 69cbfd14b4f5d5f8d056dca6062db160 SHA-1: d6d532edf58c786f388f85207c4125299b8e768b SHA-256: f0a850a2f60660f477f00fee04730acedc9a07118d33feee92aabd770e0afec5
156 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 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 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.
  • 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://trafficel.ru/123?utm_term=peggle+apk+android PDF link annotation
    • https://lovaxases.weebly.com/uploads/1/3/4/6/134685664/depopul-jajefavubofamaz-kugumaluvimuwuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417429/normal_5f98c63db9b94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_5f8e24bec7bef.pdfIn PDF document text
    • https://fexatawolev.weebly.com/uploads/1/3/4/4/134445796/zizez_mevejukeves.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_5f91e93626a5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f886b8c1099b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419002/normal_5faf12b5eb2a0.pdfIn PDF document text
    • https://murepofolod.weebly.com/uploads/1/3/4/4/134480544/notirarazejob_tisogemavugi_nogidel_lisuban.pdfIn PDF document text
    • https://sifumoxijobobo.weebly.com/uploads/1/3/4/4/134493963/jizexor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0c3aad26ff1194f72fc70/t/5fc3a02deaf37e3b640b6ac5/1606656046200/the_servant_leader_ken_blanchard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a71e78bd-fcaf-4b4b-8cea-c79034d843d9/fallout_4_clean_black_suit_ballistic_weave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94751d99-6dea-48fb-92a0-718c86d41a31/euchre_3d_free_for_mac.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_off0000ba16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA16 5012 bytes
SHA-256: 19880898a9907cb2749e4f774b514b40f2f900a619da8cb0b6aa69a1ac177e3f
font_01_sfnt_off0000cb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB38 10588 bytes
SHA-256: 23ce76f5719e7b8e30341e2a1c89ab26da9dd3db3d2e42e79ffb928aa4e2e75c

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