Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceef4cad23bfa182…

MALICIOUS

PDF

69.6 KB Created: 2020-11-24 08:14:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e35d4066e6adde3944f5f8a9a8b92a29 SHA-1: 5eb8b7cc61c908a4f9d95a17090f954146cb81f2 SHA-256: ceef4cad23bfa182fab4a0aacf32963c3389032014b8521000280852da20013b
174 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and was flagged by a machine learning classifier and ClamAV as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'notary public near me open on saturday', suggesting a lure to trick users into clicking the embedded link. The presence of embedded URLs and the ML/ClamAV detections strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://ggtraff.ru/123?utm_term=notary+public+near+me+open+on+saturday
    • https://cdn-cms.f-static.net/uploads/4403959/normal_5f9e3d02ae7f7.pdf
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f8b20a90ce0d.pdf
    • https://cdn-cms.f-static.net/uploads/4417535/normal_5f9c7bea670fb.pdf
    • https://cdn-cms.f-static.net/uploads/4372740/normal_5f8fbf91d484f.pdf
    • https://cdn-cms.f-static.net/uploads/4375355/normal_5fad765d1788d.pdf
    • https://cdn-cms.f-static.net/uploads/4463792/normal_5fa38a4e0ac94.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d67882cc-7e73-43fc-973c-a92a50f75956/52583252208.pdf
    • https://s3.amazonaws.com/bupaxomu/36489798754.pdf
    • https://s3.amazonaws.com/zikeko/13070643675.pdf
    • https://uploads.strikinglycdn.com/files/16ddd1d2-1371-450a-8bcd-69e57309da45/74427112547.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d254.bin
74b14cd73ab4af6523924049af67214fc9e9ca01da5707d1634d975bdb3a011a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD254 5432 bytes
font_01_sfnt_off0000e4bc.bin
c50968790558523124dbce7393911e93ab42e7f4634369b2618e8e2d57e20071
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BC 10928 bytes