Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08a0f21a9f9e17a…

MALICIOUS

PDF

76.7 KB Created: 2020-11-21 19:41:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8a7ea96fd9fb848667658434ed228ce9 SHA-1: 8839569da35bfc5f51a7e5668afcf4ae04fc6bcd SHA-256: a08a0f21a9f9e17a6376808445e7f2d1a8606d4a9ef3433885e54b5f3b40b35a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO link farms or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit users by directing them to potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/aws?utm_term=whirlpool+awz+410+washer+dryer+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375509/normal_5f98b0589557b.pdfIn PDF document text
    • https://wubabenababi.weebly.com/uploads/1/3/4/4/134432193/mukofejup.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/f6c28c462fa46.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/napisakaluja/hotstar_app_for_windows_7_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/jesomosamusezenonami.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/bzu_prospectus_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/how_to_cancel_icloud_storage_subscription.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/97383598687.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/46533966743.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/nfl_fantasy_draft_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/edhesive_2._8_code_practice_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/es_socra_ccrp_exam_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/vofemufij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE085 5540 bytes
SHA-256: e8fd93034edb0be8c5e17c9814341c291a7d3b9d3fe2cd11cf9a3038aad515bb
font_01_sfnt_off0000f34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34B 10712 bytes
SHA-256: 8faa656a0a5c3e018367451572f3511ce38c3d01fbdf854de297ec812a33d4b1
font_02_sfnt_off000117b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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