Malicious PDF — malware analysis report

Static analysis result for SHA-256 afec2211a00f7312…

MALICIOUS

PDF

68.9 KB Created: 2020-11-26 10:48:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1ef741dc63fa52e903dc2318651bba0a SHA-1: ddb274a3b9e48f5578b318caa9b0e0f93ed53628 SHA-256: afec2211a00f73126d25f6a54eaac8900dae88bce2beb27a03be69d4e3649fb6
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://trafffi.ru/123?utm_term=cultural+artifact+essay+examples PDF link annotation
    • https://xanugobolenaz.weebly.com/uploads/1/3/4/3/134371028/tozalodivafi-ruxox.pdfIn PDF document text
    • https://sumiloruxefeme.weebly.com/uploads/1/3/2/8/132814276/7739257.pdfIn PDF document text
    • https://dokoxinizim.weebly.com/uploads/1/3/4/3/134305801/fotigotos_rupel_kurosewovodumop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464530/normal_5fb5269dc8bb4.pdfIn PDF document text
    • https://dowamiwimeguv.weebly.com/uploads/1/3/0/7/130775936/f441854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413566/normal_5fbe1da1df7df.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/56c5a56c-6072-4582-93e1-1fc41c232f42/duxonevotowej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dee4615-5649-4e49-b13f-336c407b231a/pasakelatopevo.pdfIn PDF document text
    • https://s3.amazonaws.com/bodepova/chemistry_lab_manual_class_12_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee343b85-98df-40eb-9099-bdc15e20b253/96086800928.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/fexivujirexumuwivuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31fe81e4-e2d4-47fc-8396-792cf517b833/michael_myers_blue_jumpsuit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24c1ecbc-e624-464b-9f2c-1b56f273661b/spw_studyguide_for_signing_agent.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_off0000d10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10D 5236 bytes
SHA-256: 1e31443d0b9d3afde2932dd03643952479256db0d3c931c60ea6d5b18a64b8a0
font_01_sfnt_off0000e2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D5 10560 bytes
SHA-256: 10e2e1f6adffeea9a6a8be647af2e97dbb4a80434d9bebeefb9849e4c2b94a53

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