Malicious PDF — malware analysis report

Static analysis result for SHA-256 c75381375d567978…

MALICIOUS

PDF

67.9 KB Created: 2021-05-15 01:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 319dd4d02d58e15afa033f565af521ae SHA-1: 6f64b6cd316e5728ae8c7b7799cc283b7d34047c SHA-256: c75381375d5679783be0d80e38ad8faa6e774a6e8ae93763b5769f0a73c98e5a
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, with one prominent URL pointing to a site that appears to be part of a phishing or malware distribution campaign. The presence of a link farm on disposable hosting further supports a malicious classification.

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://ponafet.ru/strik?utm_term=king+kutter+tiller+for+sale+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476782/normal_60376a96c5b6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366004/normal_5fe2a82f5a868.pdfIn PDF document text
    • http://rubolanir.mypressonline.com/occupational_health_and_safety_act_and_regulations_south_africa.pdfIn PDF document text
    • http://mainsale.pro/downgrade_ps3_4.85_a_3.55_itac48w9.pdfIn PDF document text
    • http://mifudubesesul.iblogger.org/24641249914.pdfIn PDF document text
    • http://1ux.site/sifozabou43ds.pdfIn PDF document text
    • http://vamefegali.mywebcommunity.org/acidosis_respiratoria_fisiopatologia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496148/normal_603e625738302.pdfIn PDF document text
    • http://vanesifonemume.22web.org/arrire-_plan_flou_automatique_apk.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/60368069786q21gy.pdfIn PDF document text
    • http://leoidet.xyz/1st_grade_math_games_printablehhfax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sokevojufepizi.rf.gd/50_shades_of_grey_freed_ending.pdfIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_e6eeab031b7847fc9d7de8a2e6b47869.pdf?index=trueIn PDF document text
    • http://bapaxezeb.epizy.com/94968205971.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_4924b38848d342458883779ca375faa5.pdf?index=trueIn PDF document text
    • http://nipelijikiki.onlinewebshop.net/chirped_pulse_amplification.pdfIn PDF document text
    • https://de74b992-0de1-402f-a2cc-438209b178b2.filesusr.com/ugd/2693ef_b05c877946ab40579bac4e26b4af2ef0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/nevitobulozuzisipowerubup.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/lezekalijetonan.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/pobize.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_off0000cb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB72 5120 bytes
SHA-256: 8f1fae34e1f6840d3574a05b49f89c78335e84d21de84577a080c0d1f652f794
font_01_sfnt_off0000dcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD1 11044 bytes
SHA-256: 7a8cd4215942a0df12c1d2bb74e9e6d0fd281b70265ec1510b1ea51a83ba10c9

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