Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a21af18350cc4a…

MALICIOUS

PDF

67.7 KB Created: 2020-12-21 02:10:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 240588b633749537613358a2790f4456 SHA-1: b3822bb539d0d3d33281443f17d46991730621fc SHA-256: d0a21af18350cc4aaa77c2ea5cfc2fda774afd722462376523bb48c6aa1a1a56
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a PDF link farm, indicating it is designed to redirect users to multiple external websites. One of the primary external URIs identified is 'https://trafficel.ru/strik?utm_term=pro+football+games+today+on+tv', and another is 'https://rulutateve.weebly.com/uploads/1/3/4/6/134653171/zuguforime.pdf'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to 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://trafficel.ru/strik?utm_term=pro+football+games+today+on+tv PDF link annotation
    • https://rulutateve.weebly.com/uploads/1/3/4/6/134653171/zuguforime.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/libosokune/davosewux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc782830-af6d-45e6-887b-a34ce1d91a42/star_wars_jedi_fallen_order_cast_and_crew.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/5489339941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d5555c3-b38a-466a-b795-97483f861eab/space_saving_treadmill_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a83bfb1-2012-4e99-9603-f084fbaa87bb/85435259922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/881b1e9c-05f1-4461-a5df-06ba10aff20e/kobuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93f4de8-f250-48ee-b822-467206120658/18184113616.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/51969749678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2e351c7-4027-4fbd-b6d8-f5defa7d6494/68311146622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d02b175-cfe8-4a3a-a244-1b9b44e81a3a/70855460072.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_off0000cb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB27 5528 bytes
SHA-256: e301f33e55546ff17c0c6aa663511322cc3382627ec1f8a1ac53f5366d6b8794
font_01_sfnt_off0000dde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE9 10672 bytes
SHA-256: d4f067b6118275c797925fac134810ed1ada37a80ff459419455e79ec4f9e1cb

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