Malicious PDF — malware analysis report

Static analysis result for SHA-256 acc81e848c4989b6…

MALICIOUS

PDF

67.8 KB Created: 2021-01-11 15:31:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 906ee0722315fb096308fe3b505fb0a1 SHA-1: 187c2b15e48dbd235a2b4f72c60cbcc915fa4050 SHA-256: acc81e848c4989b6362689abd1c379a9322fa5a19cdcae250b7099a71bad6663
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ggtraff.ru/aws?utm_term=free+calendar+template+2018'. This, combined with a high ML classifier score and ClamAV detection as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', strongly indicates a phishing attempt. The presence of a visual download button lure further supports this attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=free+calendar+template+2018 In PDF document text
    • https://site-1166621.mozfiles.com/files/1166621/melewuzubanusuvog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475719/normal_5fbe5e9501e0a.pdfIn PDF document text
    • https://site-1191354.mozfiles.com/files/1191354/kivazogezilizul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457839/normal_5ff1947deaec8.pdfIn PDF document text
    • https://site-1168247.mozfiles.com/files/1168247/15981290914.pdfIn PDF document text
    • https://site-1177569.mozfiles.com/files/1177569/38544189472.pdfIn PDF document text
    • https://site-1180773.mozfiles.com/files/1180773/binder_spine_template_powerpoint.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/sikuva/fikar_not_chhichhore_song_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/hekate_soteira.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/28083327169.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/27055560976.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD57 5516 bytes
SHA-256: 987bd0f5bd71d20af8c8825141f7b8bfcb908c7266d1fb2f3f5f3b55d73c5755
font_01_sfnt_off0000e004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE004 10184 bytes
SHA-256: e3edb5472df797192094f3ff81937ec7ab8e090957427b082853514d77d12984

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