Malicious PDF — malware analysis report

Static analysis result for SHA-256 809a663471d32c91…

MALICIOUS

PDF

65.4 KB Created: 2021-03-11 02:21:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a2f7cc9b4249da1644da04a2805ddd76 SHA-1: 6809a624503649c439de018c7415dc7051b73796 SHA-256: 809a663471d32c919ef7584eba8c12ef7565391d8968300f318211e56f2e276c
242 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9740

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=simple+annuity+example+problems+with+solutions+pdf In PDF document text
    • https://geroguvipem.weebly.com/uploads/1/3/4/4/134465684/0fc6b7afc.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/LighacE/tagunetujikowoxejum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491723/normal_5fde2db13a010.pdfIn PDF document text
    • https://sefewazugep.weebly.com/uploads/1/3/5/2/135293251/vudazomid.pdfIn PDF document text
    • http://dalifajebuxog.scienceontheweb.net/how_do_you_fix_a_kenmore_ice_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/tuminageka/jghRHih/nixotagajidiloxalele.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456143/normal_5fe5ae80a702b.pdfIn PDF document text
    • https://cdn.sqhk.co/tefegegesuxe/dhb8P33/monkey_memes_2020.pdfIn PDF document text
    • http://resipowepo.getenjoyment.net/41320853429.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/ljcgcgh/fewegiwuzamuze.pdfIn PDF document text
    • https://besugadofozoxi.weebly.com/uploads/1/3/5/3/135396803/koziwinumux_zesurowemole.pdfIn PDF document text
    • http://juraxoxodas.scienceontheweb.net/brand_identity_essentials.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0c2a99dd-71fd-4a0d-b96f-672cfa785c21.filesusr.com/ugd/515c54_39ceb51b10ad4115a7e1086285879ae7.pdf?index=trueIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_8a54f49582f64b699feffbeae3af9562.pdf?index=trueIn PDF document text
    • https://4dd4a32c-aced-41d2-87e6-7ff9ca8080d7.filesusr.com/ugd/6d6f33_5dd82029213542e58873f689c8fcfe57.pdf?index=trueIn PDF document text
    • https://7a512b58-7189-4bc4-8343-f643fa9054c9.filesusr.com/ugd/1e52da_9ce67ec24bc74ae1b54f64abe14b3689.pdf?index=trueIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_a552765838474ed99604c0b106a3ea7e.pdf?index=trueIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_e9841dc1ae924990b9827c727c7793e4.pdf?index=trueIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_4d779140f34340bc840d52fd1af33c91.pdf?index=trueIn PDF document text
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_96ef082876ac48c2b8d09af5d7779de0.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF684 5784 bytes
SHA-256: ea6c692650cc033710270e146678225b82efb4ebda70f01e48842cd0895c9534

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