Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8978fe6065e4b6…

MALICIOUS

PDF

71.0 KB Created: 2020-12-24 21:24:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a6c5fe009d4f700a85040d758c29eaa SHA-1: 13fae33e1f3116f61d973bb8b8e9a2433d5c2ea7 SHA-256: ae8978fe6065e4b6f28277bd3ff8dc409093f6439a7d16ec9f8843e31994615a
262 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to known malicious infrastructure, indicating a phishing or malware distribution attempt. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' suggests the document's content is designed to trick users with promises of prizes or funds, further supporting a malicious intent. While no scripts were directly extracted, the PDF structure and malicious links point towards exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://cctraff.ru/123?utm_term=cranes+short+story+analysis
    • https://static.s123-cdn-static.com/uploads/4374857/normal_5fc404e5ab21e.pdf
    • https://cdn-cms.f-static.net/uploads/4388279/normal_5f978d8dedc0d.pdf
    • https://static.s123-cdn-static.com/uploads/4401985/normal_5fe333e1d77ec.pdf
    • https://cdn-cms.f-static.net/uploads/4377380/normal_5f9a616f87de9.pdf
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/negejenuxu_fubomudozapaxon.pdf
    • https://cdn-cms.f-static.net/uploads/4471256/normal_5fa574263f146.pdf
    • https://cdn-cms.f-static.net/uploads/4381095/normal_5fb2d81cbc624.pdf
    • https://static.s123-cdn-static.com/uploads/4486566/normal_5fcf502655eba.pdf
    • https://bafafodalub.weebly.com/uploads/1/3/4/3/134367540/7f866353.pdf
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5faa3ff44a43e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nonipesikiri/sejolunakevifa.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_off0000db86.bin
8a71f8751db476a5bb2abef9bae74340594ff3733ca03d7dd7f6da932f8d3104		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB86 4780 bytes
font_01_sfnt_off0000ebbe.bin
efbb831f7e58f2e384a035ad8a0abfc7b40787c4ac2a686171aaf1fb71219b96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBE 10572 bytes

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