Malicious PDF — malware analysis report

Static analysis result for SHA-256 de16f04290c34c44…

MALICIOUS

PDF

66.6 KB Created: 2020-11-28 18:36:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 505c6b79758cf1d0262cf91fef7e2d41 SHA-1: ba818dc00a713833b1a7a5b453c5c9f1b3fab997 SHA-256: de16f04290c34c443a5f0e5ef63d7762cb38ea2832d8c89bf6d9494230475445
162 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, disguised with text suggesting it's a CRM template. This indicates a phishing attempt to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing and potential malware delivery conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffine.ru/aws?utm_term=crm+ms+access+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4490746/normal_5fac4895811c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472486/normal_5fbc8513af283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475582/normal_5fc0a6ade2b8d.pdfIn PDF document text
    • https://kekofujazedelep.weebly.com/uploads/1/3/4/8/134879672/747511.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/bodepedejub.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/baxadelefofibuz/stateless_society_defined.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/8680667058.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/apostila_de_administrao_pblica_para_concursos.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/gorumufesug.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/basic_interrogative_words_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c503277f-ce1b-471b-9971-7e1e3379623f/53118761424.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_off0000c888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC888 4984 bytes
SHA-256: 027f50ac0578d59b80225293b65374ef64a3f5533e5c5a2f9a3c31f92ba9669c
font_01_sfnt_off0000d95e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95E 10848 bytes
SHA-256: 987ba6636ec3ac1fbcdf8adc69d3f44bfcd43350d8fac05d60607080bbdb4f91

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