Malicious PDF — malware analysis report

Static analysis result for SHA-256 9149a0df78a453ba…

MALICIOUS

PDF

73.3 KB Created: 2020-12-19 22:56:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d55102748790a05c3d8ebf4ba30aeebb SHA-1: 9171857583c376331b89a2f6d3900e684c362cf5 SHA-256: 9149a0df78a453ba7112a00456e39303bc30dc4d6f990f836fcda65b44edca8f
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/strik?utm_term=petsafe+drinkwell+platinum+pet+fountain+overflowing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382793/normal_5fb6d97618c57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387810/normal_5f994c77d8db4.pdfIn PDF document text
    • https://xivamiwilazux.weebly.com/uploads/1/3/4/7/134742933/9007275.pdfIn PDF document text
    • https://pebabole.weebly.com/uploads/1/3/4/6/134698512/tazojojitogoxu-latoluk-gabeni-refute.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375340/normal_5f911d973fc64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453718/normal_5fa4d46b4f2f6.pdfIn PDF document text
    • https://lomimasexoguxi.weebly.com/uploads/1/3/4/7/134736135/pekolewikaga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404116/normal_5fdc340d544d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402503/normal_5f9d38c404522.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc7b5119849b27a00a8296b/t/5fd5f34972b1137fa96aaa18/1607856971873/ashtabula_county_building_permit_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1d8a227-957f-4a10-a743-a1ddb09600f4/54187802047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db8a14e-1902-427f-968e-0f45ef1f1cc7/napa_1348_oil_filter_cross_reference.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f5b0c6d9645836227daa/t/5fcb46d3bce7087d1adaae77/1607157461381/samsung_alpha_battery_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dfe315c-fddf-42c1-ac43-a1ba76f5436a/63811422772.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_off0000d2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FE 2900 bytes
SHA-256: 40ce0bc9b113ef031639604f059b60aa9f1e41b097d60e75bfbf620cccc66306
font_01_sfnt_off0000dd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD42 5580 bytes
SHA-256: c5c67338378b79e6a1e96e3a37c4cc991027e798ec8e6a19cefd1bbe8baa81f1
font_02_sfnt_off0000f047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF047 10772 bytes
SHA-256: bc3c8459147c16ae54539943f8bc7a364823c215b0a5c946fdb2bc1d7096240c

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