Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a2b5daca0c40ba…

MALICIOUS

PDF

93.5 KB Created: 2021-01-09 03:05:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f9c00fed04c0d948773914d2b32ba727 SHA-1: 7f32c4edc4f987283913b7eedefde735fe7b3d0d SHA-256: e2a2b5daca0c40ba975a277f0d76e828bc362fabc4fd6853ae7df48e4df9ec7e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. One prominent URL, 'https://trafftec.ru/123?utm_term=natural+gas+alarm+lowes', is directly associated with the document's apparent lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://trafftec.ru/123?utm_term=natural+gas+alarm+lowes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481273/normal_5fc7d897a94f3.pdfIn PDF document text
    • https://vejegiraforid.weebly.com/uploads/1/3/4/3/134311029/5b2f9f.pdfIn PDF document text
    • https://famojiwogupoj.weebly.com/uploads/1/3/2/3/132303340/603ec9b64.pdfIn PDF document text
    • https://rilodogalaru.weebly.com/uploads/1/3/4/3/134398508/5897332.pdfIn PDF document text
    • https://rirokenu.weebly.com/uploads/1/3/5/3/135349909/wudisasujeno-zadagebefadup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e62103-7ed8-42dd-be3e-1b49dce4aec2/dnd_5e_charlatan_s_die.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/760d12e1-b33d-4c58-a6e9-b11250b026e4/ashley_furniture_houston_galleria.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/cap_full_form_in_sadp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65befd96-1465-4d89-9a55-8195f479a6e7/unity_5_professional_edition_serial.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/vipemararupimeboke.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/konanekajezivarewitubutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0adca37e-c433-4437-b5b6-54f76f6ca940/imagine_heaven.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_off00012fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEE 5064 bytes
SHA-256: 53320214db0eee9337382955a5f13524eb3a5ff930a97dd33b0a3ae1947530d0
font_01_sfnt_off00014125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14125 12032 bytes
SHA-256: 0c10c64680e3814c8750b1aa8fa392c649d036076015f0f3defef676186de80a

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