Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f266ee4b7bdc069…

MALICIOUS

PDF

75.8 KB Created: 2020-12-03 23:10:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5c866da12107828782de36ff989e8b60 SHA-1: 145910ac81915b0447c811af4cec6d97d0dd99ec SHA-256: 9f266ee4b7bdc069d6a3e4af9b08889e7c1d1df1e8f338727c24b372f99a82d5
196 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many of which appear to be part of an SEO link farm designed to redirect users. The primary lure URL, 'https://trafffi.ru/aws?utm_term=jual+avanza+2011+manual', suggests a phishing or scam attempt disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffi.ru/aws?utm_term=jual+avanza+2011+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452395/normal_5fa685d87312a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412570/normal_5f9fd95cd696f.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/muzisawos.pdfIn PDF document text
    • https://sowameneritela.weebly.com/uploads/1/3/0/7/130775755/4d63b86627674f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387230/normal_5fabcf7b28fde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f8b7db51bb47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5f8aa6a3cf8cf.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/5fbce344be7cfc36344e8aaf/t/5fbf52233485235c86bd1a08/1606373929160/rovolonuzisobalabumaf.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/pubawegotik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c721527-cc2c-400f-b2eb-a37eff748c91/ergonomic_mouse_pad_with_arm_support.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdffa43f75b166439b78c6/1606287270664/columbia_st_marys_grafton.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc114788ef7301f8b11b9bb/t/5fc3feb23f75b166434feba7/1606680248689/ge_self_cleaning_oven_instruction_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC592 4984 bytes
SHA-256: 0e315566f320527d4bde8549b1ea7c19e95a1dac67c2d27d0c4d809b1e9be063
font_01_sfnt_off0000d687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD687 2828 bytes
SHA-256: 358c3f115a1974b8944c00c9ab9d81ffc5a18a838fbc107c80f19892a7e1daa5
font_02_sfnt_off0000e2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BD 12392 bytes
SHA-256: aee34150d992e27dce84ec5fbefa3113e220868dbedf1d7c085e53c4fad9f80d
font_03_sfnt_off00010b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B63 16148 bytes
SHA-256: 20f59c87e9b9672ab98c41d2e905cf651a78fdd3ce15703607ff36fd27750faa