Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd2acd1b7e047a8…

MALICIOUS

PDF

83.6 KB Created: 2020-11-20 08:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 06755f1b691209c8e38e06886c27cf52 SHA-1: df0a034680886d8edcd031ffb77fd487524cc967 SHA-256: dfd2acd1b7e047a88f34d7d983c8dd479018031ca4e9f0c60029479ba220a018
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-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/aws?utm_term=aadhar+card+pdf+open PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391920/normal_5f99c41a6005e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5f89879fbe169.pdfIn PDF document text
    • https://pevomoten.weebly.com/uploads/1/3/4/6/134626000/lakosibavur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f87cb2b60fee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407066/normal_5faa4a7f1e92d.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://uploads.strikinglycdn.com/files/c9c17fad-fc89-4608-a233-4b4234ac51ff/muzunufowotipavewunifopi.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/what_are_igneous_rocks_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9d586e4-3021-4b81-b184-36debf045fbc/kurivafogaderufetipijo.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/12519195343.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/91028846288.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/to_kill_a_mockingbird_chapter_4_quotes_and_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/nissan_60_forklift_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF47 4680 bytes
SHA-256: 3f09dd8bf674c6abe54cc715c6e9814144c659659f49107d3520c40675550339
font_01_sfnt_off00010f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F12 10676 bytes
SHA-256: be3e1ed16f244da8c75eace179220836b87051eb0fd0c756954c57847dc2f0ac
font_02_sfnt_off0001339e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1339E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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