Malicious PDF — malware analysis report

Static analysis result for SHA-256 10b801adcff4f105…

MALICIOUS

PDF

83.6 KB Created: 2020-11-22 20:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0a80755075780b6a6e4b13ffeda53c5d SHA-1: d16afba63f71893a13a6cb4e52663ff279748e17 SHA-256: 10b801adcff4f105ee22ae6b6bbb305b1b20f752120264e25b9bea330e73e073
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to Weebly domains, suggesting a link farm or SEO manipulation tactic. The embedded content, though heavily obfuscated, appears to be related to search terms like 'bus driving games free pc', indicating a lure to drive traffic to malicious or spam sites. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external URIs supports the conclusion that this document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://trafficel.ru/aws?utm_term=bus+driving+games+free++pc PDF link annotation
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/noxolu.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/44d87feaf8ee.pdfIn PDF document text
    • https://petavigavixate.weebly.com/uploads/1/3/4/4/134459614/tegufagidarom-gameji.pdfIn PDF document text
    • https://vegilirebaj.weebly.com/uploads/1/3/1/0/131070576/7f2b4a6a7222.pdfIn PDF document text
    • https://lejoxenususoja.weebly.com/uploads/1/3/4/4/134497781/tejunapimuroji.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/susopuzupure/ball_mill_optimization.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/foolscap_paper_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63e854da-a508-488b-b03d-f1b7504183a7/92584515922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a17741d-8cb7-4ee3-834f-cb4bc647b8ee/wewonavujoropolubap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc72995-d6ad-42c9-aa43-3943580b0486/gmc_denali_road_bike_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/pathfinder_take_10.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/96797732975.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/army_rider_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c3fd73-1919-442d-828a-177d94d459c9/nezuginotarudigo.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_off0000fd0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0F 5244 bytes
SHA-256: 517075d4f1c971836506cbcd0057e01301c9e89a2f4b2e32cbfcc1a1a752cb45
font_01_sfnt_off00010ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECC 10660 bytes
SHA-256: af71a1922eacc27e038c311492553886de45eae3aa5b8f13dae829da16ae80d7
font_02_sfnt_off0001334d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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