Malicious PDF — malware analysis report

Static analysis result for SHA-256 e012bfa92f36f8f4…

MALICIOUS

PDF

70.9 KB Created: 2021-01-08 15:38:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 97f06fddbe7adc8a9bfed4b8270e8604 SHA-1: ba9c77bee8a7e9ca138eac27b3c98e77b4c031d5 SHA-256: e012bfa92f36f8f49433bff9100fa70853605def941820e57a73282ce22e71aa
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL pointing to 'trafffe.ru'. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and heuristics suggest it's designed to redirect users to potentially malicious or SEO-manipulated content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=duct+tape+sheets+multipack PDF link annotation
    • https://gugekeki.weebly.com/uploads/1/3/4/3/134374678/geditubozekelifo.pdfIn PDF document text
    • https://jixepelisu.weebly.com/uploads/1/3/2/6/132695865/91df0e6d1a45.pdfIn PDF document text
    • https://bovaromekefa.weebly.com/uploads/1/3/4/4/134403346/gesabebumib_tigunapafiw_xofuwuno_nopawanip.pdfIn PDF document text
    • https://latijivetazemor.weebly.com/uploads/1/3/0/7/130775002/0dd87284bfc679.pdfIn PDF document text
    • https://tefimapotile.weebly.com/uploads/1/3/4/3/134351392/2748090.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413231/normal_5f949167818dc.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/regovadeje/affiliate_marketing_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64af3c24-cda3-4f55-8f10-123e19525c75/coyote_creek_elementary_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/587f3462-81d5-4847-9b4f-5853d866c7fa/jinuseg.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/43420055929.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/rgss-rtp_standard_enterbrain_download.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/comparing_parallel_functional_languages_programming_and_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8abd9f07-d53b-40f5-9529-e87cc0205b3d/janizosutuzuzidajigot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b74ccbaf-7a39-4ffc-98bb-390bccac5f81/14930690939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/196ced1b-7b1d-4844-aab9-4c23c162d97c/univocity_of_being_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/41452544666.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_off0000c96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96A 4804 bytes
SHA-256: bd82863e4bf273a9c67688e3e7994abe4a64f85f9e39519f100a460aa34870c4
font_01_sfnt_off0000d9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D1 11600 bytes
SHA-256: cbacc9f4de3e93182a45ed23931836e130143b008ed43f1d17c531c94b2f581b
font_02_sfnt_off000100d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D9 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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