Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ddf05188a3cb977…

MALICIOUS

PDF

68.6 KB Created: 2021-01-06 03:08:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 422090c25627c0400384cc18d05d159d SHA-1: d30c89b170862dcb6d1383f4cea5e3b35f6e4187 SHA-256: 8ddf05188a3cb9774a4250810d1dae12633cf8af6ad9fc40d88985d9cd1b2cf9
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a heuristic indicating a PDF link farm with external URIs, specifically pointing to 'traffset.ru'. The document body, though heavily obfuscated, suggests a lure related to game downloads. The presence of embedded URLs and the overall structure strongly suggest this PDF is designed to redirect users to malicious sites, likely for phishing or malware distribution.

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://traffset.ru/aws?utm_term=game+android+apk+data+obb+offline PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451970/normal_5fd0bf717a03f.pdfIn PDF document text
    • https://zujolifuwumew.weebly.com/uploads/1/3/4/7/134773321/xobijufiweji.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/e8b9ea28-214b-4363-a575-7d23aa11d3c5/9117714256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7edaee67-c4ad-416b-b170-6797ca4c2d77/elvis_film_complet_en_francais.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/steel_bridge_fabrication_guide_specification_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15305ad4-6147-4178-b5ac-34591d88bfaf/6925176034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8967ad3e-9bdc-4bfb-8d19-1fed35f29fef/celtic_knot_wood_carving.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/86954731599.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/amway_product_price_list_in_india_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf8492d1-1b1c-41a7-b3c2-c65980732e48/stereochemistry_conformation_and_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f25822c2-024a-4a78-bb4c-0d01e26b2731/72266449358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5de8330-e3c9-4832-8666-0f5d0052d748/afaa_primary_group_exercise_certification_study_guide_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/d_d_adventurers_league_dm_log_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/xuruwit.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_off0000d051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD051 5244 bytes
SHA-256: d8691699a41d97dac55e257c5f5f57554293e162b78d5b67a33f182b649995f5
font_01_sfnt_off0000e214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE214 10364 bytes
SHA-256: b9258879761aad28228e94b89594072bfb3ffeafb8b8ca7908c5be839bd279c8

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