Malicious PDF — malware analysis report

Static analysis result for SHA-256 9042776f80a34b11…

MALICIOUS

PDF

66.8 KB Created: 2021-02-24 07:03:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 852c5c92d74c86a30d6770932c588c5d SHA-1: 5f401511f05a3e7bee0ef2ff2300cae312763453 SHA-256: 9042776f80a34b11d12f014aacd578b0ba36801ac25c3f7030988b04787854f2
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 0.9998

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://leonvi.ru/123?utm_term=suzuki+drz400sm+service+manual+pdf PDF link annotation
    • https://bavopasivivewid.weebly.com/uploads/1/3/0/7/130738836/5400798.pdfIn PDF document text
    • http://biotringel.shop/yeastar_s20_datasheetkkkjr.pdfIn PDF document text
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/7188752.pdfIn PDF document text
    • https://zevijilutijeso.weebly.com/uploads/1/3/4/8/134850931/vizatukik.pdfIn PDF document text
    • http://prodit.space/addressing_mode_of_8086_microprocessorvl8jq.pdfIn PDF document text
    • https://povaxabo.weebly.com/uploads/1/3/5/9/135976235/990536.pdfIn PDF document text
    • https://zobegutibeg.weebly.com/uploads/1/3/4/9/134902349/693707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486034/normal_5fd77e0a3f3ff.pdfIn PDF document text
    • https://tinozuxitijerel.weebly.com/uploads/1/3/4/5/134528375/3515845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449614/normal_5fd2e38ef1d7c.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/73456325554aac21.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/werowibovezoje/augusto_boal_forum_theatre.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/20989034691.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/wuvatepavatew.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/alien_dance_song_ringtone.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_off0000c6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C6 5808 bytes
SHA-256: 3bf1e64980f346e2b596d3e7e248e98ea0e52f17594d96635123d109b6290d66
font_01_sfnt_off0000da91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA91 10572 bytes
SHA-256: a9d7909e75b601c98b1eac67ab4c5e48cf848ab626940f9f38a1d2a03c74d40e

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