Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eabde565cefef51…

MALICIOUS

PDF

73.8 KB Created: 2020-12-09 12:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 952bc787fdad653bfc7fcfebd3bdd52f SHA-1: 2a95de8c71eb7d10d2976bb3b55b8e9f90103be9 SHA-256: 7eabde565cefef51a015b22a7da61c4af48d0aaa21483a696ead1eff30efba71
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://traffking.ru/strik?utm_term=linear+regression+worksheet+with+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5fa7028bbeef3.pdfIn PDF document text
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/nadikix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487184/normal_5fc745c5d110d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421770/normal_5f97f29d742d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_5f8c6b3ec5393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487423/normal_5fbe10fdae2aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448126/normal_5f9e4a0431162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f8ca1a882bbe.pdfIn PDF document text
    • https://xufiporugagom.weebly.com/uploads/1/3/4/7/134705457/gixepipi-zepak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447646/normal_5fc3e03d8c32c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5fa0e47f8e874.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/e4fe7e45-d38f-4ec3-b6a0-71d659fd42f5/ana_deal_of_the_day.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd03f68cb11b25c09ceb64/1606222839382/rovaxiwel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d486074-98f0-4716-b15e-fedf58241d77/gsm_module_working.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc71f59c43b17119888dce2/t/5fc7f1ff8a66f53a611ab92c/1606939136666/61760173824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/353560a8-104e-4b6d-8cc4-16f9df1fd6c9/the_domain_expeditionary_force_rescue_mission.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_off0000e60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60E 5012 bytes
SHA-256: 727e27c9f018c2cc99c464dfe2bc1c84f757086974c635e2ed391ffcbb6ae342
font_01_sfnt_off0000f72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72F 10172 bytes
SHA-256: 3c6292e708f9404833c03e379061974b3e9ca8eb143eeadd2ce747e7be720127

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