Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40d0105f091776d…

MALICIOUS

PDF

64.7 KB Created: 2020-11-24 15:05:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 771f92d6151daff66b92dd26a424fd86 SHA-1: b2e4dd8b65cfd98e74a79d9e63f55b275c30d998 SHA-256: a40d0105f091776d9fa3921c6f1219a68b5669e7bae93fa8abcdbffa0ce35084
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various websites. One such link is 'https://trafffi.ru/123?utm_term=red+sparrow+like+bird', which is likely part of a phishing or malware distribution campaign. The ClamAV detection and ML classifier also strongly indicate malicious intent, classifying it as a 'Pdf.Phishing.Trojan'. No scripts were extracted, but the structure suggests it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=red+sparrow+like+bird PDF link annotation
    • https://faluwizux.weebly.com/uploads/1/3/4/3/134372305/6073256.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/343c997e.pdfIn PDF document text
    • https://pojarepuvoweru.weebly.com/uploads/1/3/3/9/133999230/kibap.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/pegek/scheduled_caste_list_in_punjab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a4a03b9-542f-4d88-887d-fc6666414677/76508248641.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/44956667387.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/binuvizanugezebagusura.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/titagimaguxotovizelaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21ce8fa-81e5-48db-a253-fdf35d027a45/sawereza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d38d344d-ba01-49a9-865f-689cb87de1f8/lugofunoragopaxubafekixiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9e822ea-6090-4e7e-a03b-9bd96270f85e/59331936243.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_off0000c24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC24E 5256 bytes
SHA-256: 10f575f4d7f8bb91f76c9aafaa27b34d28354d90e67340ae0853b9863564d9dc
font_01_sfnt_off0000d44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44E 10144 bytes
SHA-256: 9b32ce973e89f0003105d1fd3ae4eb5d987708f202546d4dce05c6e538786bc2

Open this report in the interactive analyzer, or submit your own file for analysis.