Malicious PDF — malware analysis report

Static analysis result for SHA-256 221835829e71fae8…

MALICIOUS

PDF

162.4 KB Created: 2021-05-14 10:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 846cdf4d0f4aaa337fea2c57c78a9b90 SHA-1: a9fc8a93e106feaf071bd7bf8ee42efc6372ae83 SHA-256: 221835829e71fae856d6bbea2dbb9278a60f6999be46fe0c00ab1c51f86b1808
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

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 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://mezovuduw.ru/strik?utm_term=powertec+workbench+multi+system+review PDF link annotation
    • https://cdn.sqhk.co/pidodalatip/zhbF5x2/29081751860.pdfIn PDF document text
    • https://wemupubipu.weebly.com/uploads/1/3/5/3/135331653/lifutoben_tipedonoginekop_disopuri.pdfIn PDF document text
    • http://timinome.getenjoyment.net/roxewozekagivilad.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/CVRhfyE/football_coach_2_achievements.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/Ijfllgf/huey_helicopter_rides_dothan_alabama.pdfIn PDF document text
    • https://bomevalaruzaf.weebly.com/uploads/1/3/4/8/134871705/4660994.pdfIn PDF document text
    • https://nenomoxemobare.weebly.com/uploads/1/3/6/0/136010140/9a6cb0479.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwolupenilu/tjjBOhd/frases_tumblr_cortas_en_ingles_traducidas.pdfIn PDF document text
    • https://tebojejuket.weebly.com/uploads/1/3/4/7/134764489/nesubod.pdfIn PDF document text
    • https://vowodilob.weebly.com/uploads/1/3/4/6/134697463/6729948.pdfIn PDF document text
    • http://vuwimoxit.mygamesonline.org/converting_grams_to_kilograms_worksheet.pdfIn PDF document text
    • https://wakukowasipala.weebly.com/uploads/1/3/4/6/134649118/sadepen.pdfIn PDF document text
    • https://vubupegizisave.weebly.com/uploads/1/3/5/3/135315261/viwusugip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_1bca50c3974740c1a71126e9ddde6b2c.pdf?index=trueIn PDF document text
    • http://sajulugebimisu.myartsonline.com/38760555977.pdfIn PDF document text
    • http://merovuditipin.onlinewebshop.net/what_is_the_best_portable_home_generator.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_be745a2ffc564b96be3ef7b32de5842d.pdf?index=trueIn PDF document text
    • http://felugibesixe.onlinewebshop.net/kanuwibisepas.pdfIn PDF document text
    • https://cbf60184-924b-4e65-abc2-244eb733ec12.filesusr.com/ugd/9a25f9_4d5f26e3bb474f7fb400efcd210249b9.pdf?index=trueIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_293b882e4e474242993d50f644c1d046.pdf?index=trueIn PDF document text
    • http://wobanunep.myartsonline.com/bejefalarasuboridaborape.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000243be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x243BE 5288 bytes
SHA-256: b9eaa62b2a83cb26e69caec58dc054a39db1cb05bff75fbd137e3c4de56e4a0f
font_01_sfnt_off000255b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x255B5 11080 bytes
SHA-256: a2bbc674c83b955fdf7fd2750dd4f99efed123cf4d71f09099a34309eff997d3

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