Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b5455696b6b1696…

MALICIOUS

PDF

75.4 KB Created: 2021-03-04 07:54:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b47df99a96edd30238a9d58170b10fef SHA-1: 54e615699fd54a90f4541ce7c8990a2e3c2cbb1f SHA-256: 0b5455696b6b16968e0bd76ef51634acfb9c294e734fc61aeabf5ca646055b6c
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 'dafemum.ru'. This indicates the document is designed to trick users into visiting a malicious site. While no scripts were extracted, the presence of a malicious URL and the ML classifier's high confidence score strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://dafemum.ru/wix?keyword=commodity+chain+analysis+example In PDF document text
    • https://cdn-cms.f-static.net/uploads/4490266/normal_6027d32134450.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460263/normal_5fe43825de2a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492580/normal_602ce3164f726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379626/normal_602c153cec4f5.pdfIn PDF document text
    • https://cdn.sqhk.co/lijedubejop/ghiFiaa/raxuvu.pdfIn PDF document text
    • https://cdn.sqhk.co/gunobawiwax/iIgcifJ/71188156308.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/where_did_abstract_mathematics_originate.pdfIn PDF document text
    • http://shop-onlain.fun/25726148745wox16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410985/normal_6005bbf370722.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463830/normal_6002770faaa7e.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/povodijirig/xezopelowibazob.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/56276812497.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/canon_g2010_printer_driver_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/3937715844.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE293 5292 bytes
SHA-256: 1ac1ac396977918473cb7088ca5914d6a25e66a9fb5e3c34d4c8ba776dc3cb85
font_01_sfnt_off0000f471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF471 2156 bytes
SHA-256: d3bf4b76db308d1a6cb83b12327d798f659752969852825af5a6d9e05345e219
font_02_sfnt_off0000fddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDD 10032 bytes
SHA-256: 2c1784a2ee57851587a135b437043ba52646e8e671b24a8df4c3def611cf8a64

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