Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef703f6c8803d4d…

MALICIOUS

PDF

104.1 KB Created: 2020-12-02 07:57:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a1e0ca180b641ab7bad9f34c2792d02a SHA-1: 906a2246eb85a155c7589f522566c1696e81de93 SHA-256: 9ef703f6c8803d4d23240c6c47444b5ad40e13fa094f08307bc1738f7c9b302c
156 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. 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 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://traffset.ru/strik?utm_term=close+quarters+tactical+utica PDF link annotation
    • https://bobepeduzogir.weebly.com/uploads/1/3/4/6/134673546/tirozexovo.pdfIn PDF document text
    • https://tidivexosito.weebly.com/uploads/1/3/4/3/134316292/1ddbdb2f0c4.pdfIn PDF document text
    • https://fijegude.weebly.com/uploads/1/3/4/8/134850985/bebogub_zolenuselik_xakukifeluwo_juwowiwix.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/5fc0d446ab79f442f2293e00/t/5fc713466beae454315e08c2/1606882119145/veduvopugotitogavag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a56bc7-abf5-40f7-b720-102f9d0aed1b/kuretoxomodelifulunoj.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/zasose.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/gonoxoputolotuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a1ab880-7efd-465f-993c-f7ef48182aa0/chromatic_scale_finger_chart_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/st._mary_s_church_rockville.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/bawet.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/motugozoz.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/baby_mama_challenge_song.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2740a2757459be2c9b8/t/5fc141189b1ed0353809e4ff/1606500632837/triangle_fractal_gif.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000151c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151C5 3080 bytes
SHA-256: 0fcef192c95d6fd4d5333de3e5f0a04c8525a73f6e29f4febd37223f58d6e746
font_01_sfnt_off00015cce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CCE 4824 bytes
SHA-256: 94aeedfe8bcfa7e944d8de533e2bda5b978a5ff8d71362bce91d3ab8016d4baa
font_02_sfnt_off00016d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D41 11540 bytes
SHA-256: 37829ffbf8b38a3ea49ba157400d447bf2fc75e1467459d7e0e4b38255783df8

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