Malicious PDF — malware analysis report

Static analysis result for SHA-256 781da75ab6d17b15…

MALICIOUS

PDF

85.4 KB Created: 2020-12-27 04:18:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 41b7653cb545ed769ffbcb3473324fbe SHA-1: e91e324242f87a268643c30bd5135997a8f71c4e SHA-256: 781da75ab6d17b159fa37d0d1acbaa1985ddee5a6081d1e34f8f889e2025c9d0
274 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Credentials from Password Reset T1059.007 JavaScript

This PDF document impersonates Facebook to lure users into providing their credentials. It contains links to known malicious redirector infrastructure, specifically `https://cctraff.ru/strik?utm_term=wechat+pay+forgot+payment+password`, which is likely used to deliver a credential harvesting page. The document also includes a link to `https://lelobetiladafan.weebly.com/uploads/1/3/4/4/134497055/6d379d.pdf`, which is part of the phishing infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://lelobetiladafan.weebly.com/uploads/1/3/4/4/134497055/6d379d.pdf.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/strik?utm_term=wechat+pay+forgot+payment+password In PDF document text
    • https://lelobetiladafan.weebly.com/uploads/1/3/4/4/134497055/6d379d.pdfIn PDF document text
    • https://vevinobe.weebly.com/uploads/1/3/4/4/134487659/2502120.pdfIn PDF document text
    • https://nunoperiv.weebly.com/uploads/1/3/1/8/131856708/aeea83914242.pdfIn PDF document text
    • https://cdn.sqhk.co/zesunotu/cLIijig/10211177630.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/0fdf5e0a-7377-482e-84ab-0c4206c46825/tikumedimusijed.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/nick_jr_com_games_nick_nick_jr_games_kids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf8f43e9-9ddc-4ebf-b1ce-12a14dea9748/3708237836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f91bd974-8505-4ffa-8245-391c1ebe4a88/lofotobigegorigomuvaw.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/podusedakegumojikasud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/914f858e-f89c-42d8-987d-23c7f46506e0/adobe_lightroom_crack_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/88735021414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bbcb75f-ae81-4008-a1c1-086a032f0746/47821575489.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF95 6124 bytes
SHA-256: 2171307e541b2c7bf4782e42010aa3b980fa4dd9def4714cc6d4d6007bd8859e
font_01_sfnt_off0001043c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043C 5744 bytes
SHA-256: d054a29e2d5cf6e57f59aa11f796de415b07ce63e2e2a328e86fa5240261348d
font_02_sfnt_off000117c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C1 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_03_sfnt_off00012051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12051 11524 bytes
SHA-256: bb240635f4610ece1181c4561f71ff5045807198871531c3a1fbc508b3c1dacb