Malicious PDF — malware analysis report

Static analysis result for SHA-256 560fa26961e59bf0…

MALICIOUS

PDF

77.2 KB Created: 2021-05-24 05:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c412b26e9c3c320bb91c03664c2a37f6 SHA-1: 997245d0783193be20131fc7add439b05b9ca554 SHA-256: 560fa26961e59bf063efe3692c96b963e6ee4d8927fb6c4bfac1dea59d021c54
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 0.9992

Heuristics 5

  • 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.
  • 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://resalured.ru/strik?utm_term=how+to+find+telegram+links PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4428054/normal_60145dc4acda9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444366/normal_5fe383cc553fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419412/normal_603c584b569a6.pdfIn PDF document text
    • https://gulapizebulo.weebly.com/uploads/1/3/1/0/131070336/2483357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_5fda5f586aeef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461767/normal_6069a28fa9fee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421611/normal_6029e91fd0903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451955/normal_5fd6505b1e028.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450250/normal_6014666f7a95d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471488/normal_604ee771a271c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449788/normal_5ff788daa7178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376879/normal_6058d39c7d533.pdfIn PDF document text
    • https://difidewuwigexej.weebly.com/uploads/1/3/4/6/134652805/belubepuzuwud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_605d75185fa75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_6034860a1e6a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374211/normal_5fddff8eed737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467322/normal_6032a2b3cfbf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382190/normal_5ff9b040c1c94.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/aef34371-2300-47ab-80a8-6bd3e2db84aa/sinogeputinifumitetusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ec60a55-b983-4534-87a2-4dda687efa2b/how_many_calories_in_a_sonic_jalapeno_burger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e489ca-db5d-4561-acbc-e4bda5a3ee86/can_you_take_the_written_driving_test_online_in_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a546d772-42b0-4815-a27c-883afaee01eb/17605173588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9f67f2f-12c0-4a56-9dec-4f9742c7f3c7/vibrant_matter_audiobook.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_off0000f015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF015 5344 bytes
SHA-256: ce0d9551fc421d32854702d54cc8e2b1d2688453730e78aac14a3ffd896dcec5
font_01_sfnt_off0001023f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023F 10840 bytes
SHA-256: 73d4c5e587757c6d37984fcfe2abf25f097962f33dd34a83733e6e9d173a132b

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