Malicious PDF — malware analysis report

Static analysis result for SHA-256 9155eb6c5be7b197…

MALICIOUS

PDF

58.2 KB Created: 2020-12-17 21:21:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8ab5fbca9a3ee23b970a66fcabc728d8 SHA-1: 9f6e01df7d725b4d4f85ed3eb26eafe03155d0f7 SHA-256: 9155eb6c5be7b1977405d6ad9c8dcc60a2f3d91f0798a39637b986907727e5fd
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 'https://traffmen.ru/123?utm_term=apk+mod+no+root'. This URL is presented as a download for 'apk mod no root', indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffmen.ru/123?utm_term=apk+mod+no+root In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368991/normal_5fd811a2588c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417429/normal_5fc69f0a9d25e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411218/normal_5f9ba550a4c9a.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/fatisake/bike_race_mod_apk_ultra_bike.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/english_grammar_course_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/andrew_johnson_biographical_information.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/guvojoxelekim.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/igcse_additional_mathematics_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/zeruxexe.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/fabefigokasodefefukonoxos.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/macromedia_freehand_mx_crack.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_off0000aa11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA11 4736 bytes
SHA-256: 26e09a4931e39d29f0eaa1a4fb404b86b0f7b5f607492c48a49bc75e6c2ef90f
font_01_sfnt_off0000ba1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA1A 10088 bytes
SHA-256: 3be1f0b39a12d16a398fac3aae456031b95d5529355c7aa7b3a6b00d4887632d

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