Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e020e252a180a4…

MALICIOUS

PDF

67.3 KB Created: 2020-12-21 15:55:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bfb2effb5b7f2d2b3c7672255fbe8285 SHA-1: e2fdea2d080c84b21658546abacfb853b0033e8f SHA-256: b7e020e252a180a40eedaea97f628c9a23ca85d8fb924f79ac86fb21b3109272
214 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to a URL that appears to be a lure for downloading an application. The document body, though heavily obfuscated, contains text related to 'Marktplaats app downloaden', reinforcing the phishing pretext. The presence of numerous embedded links, including one to a known malicious redirector, suggests an attempt to direct users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=marktplaats+app+downloaden In PDF document text
    • https://sugevemaketajes.weebly.com/uploads/1/3/4/8/134873201/a11a8f43166cc.pdfIn PDF document text
    • https://dakijixubuleze.weebly.com/uploads/1/3/0/7/130740496/7483540.pdfIn PDF document text
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/pirur.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/zazelujeju/feminist_liberation_theology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aebcb71-ecd5-4514-b31f-6ade71765e6c/cultura_tiahuanaco_resumen.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/susonoxow.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/oecd_phase_3_report_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/tilipemalunikom.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxibipan/it_ends_with_us_by_colleen_hoover_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddbbdce5-eddd-4df7-9fb6-bcdf11ec36c9/35029421670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3defb17e-5a16-438b-b94f-8983c6cbd920/29198945904.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/70349242142.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d04840f1034a5cca8d9f/t/5fc9c1d8414f5e3523796ff0/1607057880805/xidupif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e93687-0de3-43be-89a7-99f4a35ad989/77459258582.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_off0000cbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAD 5116 bytes
SHA-256: bd6a33e182778ba79002f9a803c792cf288c76dc1838cdd9d51bf618f78fa7a7
font_01_sfnt_off0000dd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD42 10272 bytes
SHA-256: 0952d26133086654794d85ae09ee87b4800bbd28e7e0bae1754ae82bd8f9d12e

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