Malicious PDF — malware analysis report

Static analysis result for SHA-256 d092f3edb66adade…

MALICIOUS

PDF

147.4 KB Created: 2020-12-26 19:17:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 451f0c1f0c28e29fd537235cf0d6e842 SHA-1: 9321ccce59d1ed8b2e23b7b4034bd6170b117e5e SHA-256: d092f3edb66adade7220354fd0f368011a06dfc77cfb68a395ab8a991d2c4bc9
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/aws?utm_term=mockito+doanswer+java+7'. Additionally, a 'Fake CAPTCHA' heuristic indicates the document's intent to deceive users into interacting with malicious content. The presence of a callback lure heuristic further suggests a phishing or scam attempt. While no scripts were extracted, the combination of these factors strongly points to a phishing attack leveraging a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://cctraff.ru/aws?utm_term=mockito+doanswer+java+7 In PDF document text
    • https://cdn.sqhk.co/koxajavu/Fgclhbg/jamurape.pdfIn PDF document text
    • https://ranedesipa.weebly.com/uploads/1/3/1/3/131398497/radibureporim.pdfIn PDF document text
    • https://muzafudopabebex.weebly.com/uploads/1/3/4/8/134865208/ea431f27a.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8925184.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://uploads.strikinglycdn.com/files/aee2b37e-c352-4fa2-ab72-ec47f23d1ed1/82141007213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df0b1504-1ba4-40d9-b6ad-5520a95b107b/spanish_greetings_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/26537484441.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8d80f58-4ecc-43e4-aa58-32ad7f336b21/nugug.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/spotify_premium_app.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/system_of_inequality_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/classification_of_sedimentary_rocks_worksheet_14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/025865e0-4709-4762-a29e-3b914a0f8e06/mifetepebutiwejazalewuri.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/85062876599.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_off0001f8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F8D6 5068 bytes
SHA-256: f8706dfad92623887fc4d7b9c701918158c62ed8bc79521b1f235b0bbd1041f9
font_01_sfnt_off00020a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A36 11752 bytes
SHA-256: bd892a68cc8d7a1aec784cc91a6a0a48389ea29bc44ec20db63d2483d1e71637
font_02_sfnt_off0002324c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2324C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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