Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3927d1760d6a739…

MALICIOUS

PDF

60.3 KB Created: 2020-11-26 04:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d770981ee37d16e7d0b3f2c1a078acc1 SHA-1: 1e809092b10a7d9caca314813679c59abf3382f4 SHA-256: f3927d1760d6a739e08f88cf6ac6e9ba76515ddb963388a1797e97e615326ac9
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 pointing to PDF files, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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/123?utm_term=algebra+1b+final+exam+review+answers PDF link annotation
    • https://xizafezepogoja.weebly.com/uploads/1/3/4/4/134446531/nilifubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407552/normal_5f98d501744dc.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/8426960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374533/normal_5fac1e73950bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413112/normal_5fbcbc94c8b60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5fb762cb0bfc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495040/normal_5fadddba3d90f.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/pazifetanegapu/como_funciona_el_cerebro_humano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5c33d5e-3a20-41be-9ad7-5d79dc780f70/52847432298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce9af75-eb1e-4ac8-aa16-2ae7ecf8ed57/jegerepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4f579fb-a53c-4458-8e68-492d4843fc18/trac_dynamique_premiere_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e70920d-1d74-4f97-bf16-ae1b852d8213/98623761683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e457c06e-d95c-4503-9c27-c6a57b44616d/scp_the_young_man.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_off0000af6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6B 5488 bytes
SHA-256: e0906d714f093878ac64d13793aa96d0b85c42660970c6f794106c9d860b3dc8
font_01_sfnt_off0000c224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC224 10096 bytes
SHA-256: 43e850cebebc3bfa4160643669a8a00e432f94a98f675bb9032ac4c0b66c66ed

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