Malicious PDF — malware analysis report

Static analysis result for SHA-256 372e97dfe4a5fdbe…

MALICIOUS

PDF

69.5 KB Created: 2020-12-15 08:47:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3cb01b2eb2067ddaf76b5de1ae816f4d SHA-1: 104495d72a28eac08ffa2ca81bc9136107d6a406 SHA-256: 372e97dfe4a5fdbefbc88c55b5919f762b8b275b368ea954178ed3fba384877f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffking.ru'. The document body, though heavily obfuscated, appears to contain text related to continents, likely a lure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious URL is a strong indicator of a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffking.ru/strik?utm_term=cuales+son+los+continentes+y+cuantos+son In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425229/normal_5fb7eb7a0391c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420459/normal_5fc75dfd24c5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383703/normal_5f8bdda09f575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388428/normal_5f935095aa518.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/nitizobuv/beard_trimmer_length_guide_mm.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/camera_lighting_effects_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/cartoon_movies_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/gejagotexureno.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/45819715906.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/sojutadorolasoniwewoz.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/atualidades_concurso_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/george_costanza_answering_machine_without_laugh_track.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/40768052430.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_off0000d1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D2 4704 bytes
SHA-256: 21498c1a5017cdd79aa5dc1cfb12fb7164984ebca6ec2cba515e92c94c2e3234
font_01_sfnt_off0000e1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E7 11444 bytes
SHA-256: e4e040988b7d5bac6cd8cef84c95e6d65ffda511bd6ab4625b5990e3e264edd5

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