Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa183237d96567e…

MALICIOUS

PDF

76.2 KB Created: 2021-05-17 19:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 28afa6a9635034884ca49a4b4ed0b0c7 SHA-1: e93860da28f21253dfaca1aadc29d8f72615c1bc SHA-256: 3aa183237d96567e4a93934bf509e76201411a947290ab1cadadbcee1b5c2c6e
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as an external URI pointing to 'soxebez.ru'. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload via the linked content.

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 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://soxebez.ru/strik?utm_term=lg+inverter+direct+drive+washer+detergent+drawer PDF link annotation
    • http://topsalon.xyz/95937835739ingxm.pdfIn PDF document text
    • http://kunujunekedi.mygamesonline.org/can_you_be_a_nutritionist_without_a_degree.pdfIn PDF document text
    • http://shoop-ff.ru/simple_wealth_inevitable_wealth_revised_edition4nkf8.pdfIn PDF document text
    • http://vozajomaralamer.mygamesonline.org/bioclimatologia_vegetal.pdfIn PDF document text
    • http://hardcreditcheck.info/input_file_css_template2qtwv.pdfIn PDF document text
    • https://fizolapojola.weebly.com/uploads/1/3/1/3/131383549/1657985.pdfIn PDF document text
    • https://ferateritilew.weebly.com/uploads/1/3/4/2/134265971/1215054.pdfIn PDF document text
    • http://fetedeju.mygamesonline.org/61668171370.pdfIn PDF document text
    • http://keepxufi.space/menidebepozotaxijiwokj97jl.pdfIn PDF document text
    • https://zokolukesowi.weebly.com/uploads/1/3/0/7/130776120/8007483.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/0a8404a1-ec8e-4306-835c-6c24e311a02e/letidigakoxobasipewubupo.pdfIn PDF document text
    • http://kexomun.myartsonline.com/42292619662.pdfIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_47d0fa6b5cf4443094c93a36bc06744f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d9701df-db28-44ba-84e2-21611dd0e99e/ba_ii_plus_professional_online.pdfIn PDF document text
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_e0d9b0b412764f988f8881a3ea450a68.pdf?index=trueIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_7ad2cb31ece64594a5ddd13159b31ae4.pdf?index=trueIn PDF document text
    • https://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_e14d926fa81a444ea81f4f9dea66d1fe.pdf?index=trueIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/69325881910.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_off0000ee30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE30 5260 bytes
SHA-256: 08555973c213f9617d7d01c30e445ab0a202c810c8a6c10a022dd4e5094a57c9
font_01_sfnt_off0001002b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002B 10400 bytes
SHA-256: b1d2c8d7307cad1066e434a61c53976f6e6fbe3efaaa46a8828a35633b18a6bf

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