Malicious PDF — malware analysis report

Static analysis result for SHA-256 064006de88cf4f99…

MALICIOUS

PDF

83.7 KB Created: 2021-03-29 20:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b00ce9a76e2e41182ad98a5ca043a818 SHA-1: 790f8a7c7588e2f0b180c78c0c591230c808e1ec SHA-256: 064006de88cf4f992be86e164b1d4f96951cf8e91ee0e0f8e4191bc49d88b7ac
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with a primary one pointing to 'https://leonvi.ru/strik?utm_term=huffy+bike+parts', suggesting a lure related to bike parts. The document body is heavily obfuscated, but the presence of embedded URLs and the overall structure indicate an attempt to redirect the user to a potentially harmful site. No scripts were extracted, but the PDF's nature as a link farm on disposable hosting points towards malicious intent.

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://leonvi.ru/strik?utm_term=huffy+bike+parts PDF link annotation
    • https://sajozigita.weebly.com/uploads/1/3/0/8/130814351/zulasenijubebaxexa.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/RIaklid/mezex.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/eUtjSgc/rufenulu.pdfIn PDF document text
    • http://fowironomuk.iblogger.org/cbest_math_practice_test_2020.pdfIn PDF document text
    • https://paxazojip.weebly.com/uploads/1/3/0/8/130873894/b2aaad814e.pdfIn PDF document text
    • https://gulesome.weebly.com/uploads/1/3/4/4/134496781/lidivobala.pdfIn PDF document text
    • https://cdn.sqhk.co/mesafovojifo/RwEjgKD/4159668522.pdfIn PDF document text
    • https://zazobowelukoki.weebly.com/uploads/1/3/0/9/130969428/3807ffb2bc4.pdfIn PDF document text
    • https://cdn.sqhk.co/dadirowuj/gdD0hfE/galaxy_defenders_operation_strike_back_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/wafudovop/fib7jh4/57742699978.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_af7c478c3baa4439bcd122ceeb0ad502.pdf?index=trueIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_3441cbf1fbaf45bfa51da79575a794a3.pdf?index=trueIn PDF document text
    • http://gefofezas.rf.gd/basic_english_learning_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/739f0d99-c1fd-402e-b332-6b0e0d95e1d7/nail_salon_open_at_8am_nyc.pdfIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_e5f544bae34a4b8da1a6fe2799c7ab34.pdf?index=trueIn PDF document text
    • http://wewozewifepono.epizy.com/psicologia_personalidad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3d3adf5-0205-4aec-ac78-5f955ae64d41/36874913810.pdfIn PDF document text
    • https://ca483b97-61ac-4196-bca0-6b249c18eca9.filesusr.com/ugd/b27199_71327e893e2c401fb1824ea79c41e098.pdf?index=trueIn PDF document text
    • http://vesuduw.epizy.com/oster_5838_bread_maker_pan.pdfIn PDF document text
    • https://61249681-e2d1-4375-841a-b3723294d79c.filesusr.com/ugd/3d514e_e320b2c715db49e48b3af8a25d5fbb9f.pdf?index=trueIn 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_off00010b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3A 5132 bytes
SHA-256: 9378e49e02e881e9870917ba057b2ac135168b6ecdf30d648b42cf0eadab509d
font_01_sfnt_off00011cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC1 10940 bytes
SHA-256: acf41fae5904067eac1a06d0575a65384e2449de60b4f910e27c61f8fe05696a

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