Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96636995aca04b1…

MALICIOUS

PDF

58.1 KB Created: 2020-11-18 12:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1cf6e382d373a31c415c25990e0027e4 SHA-1: 644513578aa766abe6159376f22d54b76e066f73 SHA-256: a96636995aca04b154c4a17e96570a00e5c8c22d8113d4086850da0bbb55956a
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 0.9996

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://trafficel.ru/123?utm_term=rust+legacy+servers+list PDF link annotation
    • https://duzufekiwavana.weebly.com/uploads/1/3/4/6/134609718/afca2c20.pdfIn PDF document text
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/jumibopegixifazoga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377102/normal_5f8b845465e73.pdfIn PDF document text
    • https://gitexapovaje.weebly.com/uploads/1/3/4/4/134464395/fepabubodo-fenigeje-betatog-paxomuximu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5f8b417c6b81b.pdfIn PDF document text
    • https://lonunibulitog.weebly.com/uploads/1/3/4/4/134498578/6b5bf1b06571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5fae9bd1a7416.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413122/normal_5fa2baa667e06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418385/normal_5fa5ff1ba2093.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c7ee29-40ae-41d5-9514-8391ca16dce6/84482372892.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/labidisig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ebba206-b823-424f-9daf-7911bfa8863b/zujusukuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31ebec9-c019-441d-8614-6d54dab695a7/bowusopag.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8AA 5136 bytes
SHA-256: 043531fe8fb81379af19fb68d7bd6c894fa36a14b94761deb2b8acbed5309e3a
font_01_sfnt_off0000ba49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA49 9424 bytes
SHA-256: 378f303ebf3dfa15f925084a9c743eefa9d048f920971fe820d4fb8501fb21f4

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