Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c9204ce219d3ca…

MALICIOUS

PDF

75.2 KB Created: 2021-02-27 19:17:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0c50403472ba66107ea6aade04ebe33a SHA-1: bcc18bef05f89c1d8f9348fe85f9df96496152be SHA-256: b0c9204ce219d3cad350ef49147031f905721bc2a32ed206139354fc3a8d796b
184 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many of which are to PDF files, suggesting a link farm or a method to distribute further malicious content. The presence of urgency language and callback lures further supports a phishing or scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/wix?keyword=passtime+gps+reviews PDF link annotation
    • https://sojekaga.weebly.com/uploads/1/3/1/0/131070529/03660530466ab.pdfIn PDF document text
    • https://filuloxi.weebly.com/uploads/1/3/2/7/132740414/c540cc169d6748.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456132/normal_6008ffd1c8287.pdfIn PDF document text
    • https://tiwudusakuwizir.weebly.com/uploads/1/3/1/6/131637104/difuperafoxit.pdfIn PDF document text
    • http://all-system7.club/introduo_ao_projeto_de_pesquisa_cientfica_franz_victor_rudiourp8x.pdfIn PDF document text
    • https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/7102754.pdfIn PDF document text
    • http://chategratis.online/36550659840lufdt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490264/normal_601edb018704a.pdfIn PDF document text
    • https://kefapadasogimok.weebly.com/uploads/1/3/4/6/134601884/77812.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/lg_g4_stylus_manual.pdfIn PDF document text
    • http://fb-copyright-help-from.com/72982535262vaael.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/6089865634.pdfIn PDF document text
    • https://notesorujul.weebly.com/uploads/1/3/1/4/131407176/906c4ced3a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saxodanokijaj.atwebpages.com/ncert_maths_practice_book_class_6.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/delegate_adapter_pattern_android.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/how_to_pair_panasonic_cordless_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/synonym_for_training_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/diabetes_diagnosis_guidelines_nice.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_off0000eb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB05 5260 bytes
SHA-256: 132106907c9ecc4b6b3519f41cb4565500a5ea4ac198762f53313b72405f98ae
font_01_sfnt_off0000fce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE8 10148 bytes
SHA-256: 697b01efc8bcc72e0d81807a16991baf06ffd72246a9574eef70c4613dbf0986

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