Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b96126296747fb7…

MALICIOUS

PDF

79.5 KB Created: 2021-05-16 05:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 06a9eb5e2da7930d3f023a52565c1e09 SHA-1: b70f0a626ca30f8264dbbee8e9259eaf5c66a674 SHA-256: 4b96126296747fb7e6f0523491f3211da0a7cdad79480b6aa4c54dc01de01f82
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, with one prominent link pointing to 'baarspo.ru'. This, combined with the ClamAV detection and ML classifier flagging, strongly suggests a phishing or spamming campaign. The document's content, though heavily obfuscated, appears to be a lure related to electrical diagrams, aiming to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/strik?utm_term=tipos+de+diagramas+unifilares+electricos PDF link annotation
    • http://kismyketio.com/vegotewerawodapekef9gp4x.pdfIn PDF document text
    • http://btsworld.org/lanosukc51jf.pdfIn PDF document text
    • http://gallery-shop.site/how_to_decorate_a_white_christmas_tree_in_bluelne8l.pdfIn PDF document text
    • http://twoup-viktoria.online/tartine_bread_book_table_of_contentsp0nft.pdfIn PDF document text
    • http://sweetmeet.online/gamifarisekevemum72w7.pdfIn PDF document text
    • http://verification-help.com/intermediate_botany_practical_manualuj5wc.pdfIn PDF document text
    • http://theporte.xyz/michael_crichton_prey_summaryaebhs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4859821/normal_60554e0482b43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484834/normal_6025ec6c36c80.pdfIn PDF document text
    • http://trychambre.xyz/25646157555wnegu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426953/normal_6005b6a019dc2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/one_punch_man_season_2_vrv.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/14371835524.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/brown_and_tan_mini_dachshund_puppies_for_sale_norfolk_ne.pdfIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_3c80d09f5d1c41adab14ca012e65288f.pdf?index=trueIn PDF document text
    • https://a49a6154-edc8-4132-95a2-c7bb8d673fe9.filesusr.com/ugd/551169_6e4fee4eace7430082a928941986988b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/kavamuximimugetanakedip.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/pijowubufolerurotupemip.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/28064238255.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/business_information_technology_jobs_salary.pdfIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_4faec7d91aa3481ead1f7f7206694c8e.pdf?index=trueIn PDF document text
    • https://6184de0c-c318-42a7-882e-c5ddc63b817d.filesusr.com/ugd/1c8c1e_0508fceee5d94427881d833a4b0fdd52.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/butivavijuvuxiz.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_off0000f736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF736 5424 bytes
SHA-256: 1d244989a4780e18c479ebbccd5f01bda3c423afb84e11c58838e040bf9be34e
font_01_sfnt_off00010997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10997 11384 bytes
SHA-256: 9bbc466f9efeff83ca31ec27a605b6fd6aec0afd24ef28d6d33667a7be3167d3

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