Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6942ce57934befc…

MALICIOUS

PDF

70.8 KB Created: 2021-03-15 23:08:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f4daf3bba899813fedb123c87db902c3 SHA-1: 7b33936acbdf9023bc88bc4a253449dc85b633e9 SHA-256: d6942ce57934befc72fc3906f72054d3faaaf05014135c964ace2f429324b62f
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one, 'https://kuzutuzo.ru/strik?utm_term=bosch+1617+parts+diagram', appearing to be a lure for phishing or malware distribution. The document body, though heavily obfuscated, suggests a deceptive theme related to technical diagrams, aligning with common social engineering tactics.

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://kuzutuzo.ru/strik?utm_term=bosch+1617+parts+diagram PDF link annotation
    • http://faceskinagainbeauty.xyz/38830149532z3l8v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499283/normal_602e53da89822.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462696/normal_5ffe5ad96c1bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485016/normal_60145cb752f64.pdfIn PDF document text
    • http://hardcreditcheck.info/did_tesla_make_the_light_bulbjua6y.pdfIn PDF document text
    • http://duvotikuvazax.22web.org/papikagarafe.pdfIn PDF document text
    • http://nout-sale.site/fundamento_del_marketing_william_j_stanton70i2q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_603e3d50a189b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461525/normal_601e655c8d7a2.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/bd807827-7b7c-4452-9482-fccd5a517fa0/tofunotinibawese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8552e193-3db5-44bd-b741-3b1f9b42da0d/what_ink_cartridge_for_hp_deskjet_f4280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97a3ab3-c32e-43d5-ba21-a78c0f5bd5b3/vibinugabuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68bdc572-ae78-47ad-af30-401d0d4569ed/tirigobapapuxume.pdfIn PDF document text
    • http://wegizadix.rf.gd/analysis_of_financial_statements_ts_grewal_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a3e307d-51ef-4b04-8ce5-cbbb0f5dfd87/how_to_put_saved_pics_on_snapchat_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/508a0340-7b37-45a2-b774-536834925498/how_many_questions_are_on_the_texas_master_electrician_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64409df9-0d5b-4f7e-bbb7-f6ef765d9761/how_much_does_chick_fil_a_pay_per_hour_in_texas.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_off0000d737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD737 5792 bytes
SHA-256: 07d4ace1e578acfdcda32473d1316767e5d01f25038a391ab682ede175b41a74
font_01_sfnt_off0000ead0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD0 9924 bytes
SHA-256: 46b78a4c882af609d1bf0a6f873dd8f6871956d7e56e7a3211fc4b9443a48f2f

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