Malicious PDF — malware analysis report

Static analysis result for SHA-256 08038a0e4975e83d…

MALICIOUS

PDF

65.3 KB Created: 2020-12-02 16:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b2f1299c05d7169f6a50feb97760d4dd SHA-1: 90baffda75766be20971b82dbbbeb012f986b0cd SHA-256: 08038a0e4975e83dc09b5828c00e2603489b8ca68dc0188853cf28c070d4c5a4
156 Risk Score

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. 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 0.9996

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://trafffe.ru/123?utm_term=parts+of+a+camera PDF link annotation
    • https://kusugano.weebly.com/uploads/1/3/4/7/134740680/gepuvonaro.pdfIn PDF document text
    • https://fatatovol.weebly.com/uploads/1/3/4/7/134707957/cdd5b402.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/kisimujuk/zijanadivu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59e7b12facd59cecd2c13/t/5fc6f4f24f9413233b147a5b/1606874355720/zenezatalepiwu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e9e3bda9c57a97be47bf/t/5fc0fe45a97599144e1a99b7/1606483526490/dixejijuze.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd8a92bbd740658005df2/t/5fc264563485235c86142ebe/1606575190686/16638588925.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf58444f98375720d76b98/1606375493016/sade_in_concert_miami.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/refractive_index_definition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe253961e25426e1025783/1606296890435/stars_sight_reading.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc345e6affbf90a66f9bf12/t/5fc770aa3d56556d143e2be6/1606906027908/4128867653.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_off0000c671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC671 4996 bytes
SHA-256: 8a1bebe596369ac4aaa2685bad7a06122e76814d20c783599e76e5f4950d2826
font_01_sfnt_off0000d75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75F 9720 bytes
SHA-256: 38fcb38aee3c09a8b8adf170dcbb48303062e1d5ae8756cd1d50c4648414804f

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