Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba1b11069f36461…

MALICIOUS

PDF

68.3 KB Created: 2020-11-25 10:51:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c09ee95095a7aecd60b738b2191e1f28 SHA-1: ae80eb3e60ed102cb777f009f595bfc83659ab14 SHA-256: fba1b11069f36461177d7232213c9bed95f972a63dc077f48c3ea4c949b0d601
274 Risk Score

Malware Insights

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

This PDF file contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm designed for SEO manipulation. The 'SE_PAYMENT_REDIRECT_LURE' and 'SE_CALLBACK_LURE' heuristics suggest the document is designed to trick users into making fraudulent payments or engaging with callback phishing schemes. The presence of embedded URLs and the ML classifier's high confidence score further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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/123?utm_term=tom+big+al+schreiter+pdf In PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/c372e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f8a45e095834.pdfIn PDF document text
    • https://jinugavov.weebly.com/uploads/1/3/4/4/134438703/xurejugigotabaral.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407788/normal_5fa4c063baafd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417046/normal_5f955c768f6c4.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/fodose/sentencing_guidelines_conveying_drugs_into_prison.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1e64fd9-aa3f-44ba-8e6b-bf1ff2cca98b/mount_and_blade_warband_character_creation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7491bd8b-9ecd-474e-ac67-cc3bb8539f42/playful_kiss_15._blm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e044b0c8-60c5-4968-b6df-37a06041be8a/fosudutejujoxegapafek.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/xunivevepiweridas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3436f4fa-baca-4bdb-b67f-0f51625ab153/wuwugopadabofodo.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_off0000cc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC32 5660 bytes
SHA-256: 7e45db70e672fefa82e054282480e047228d95a581b6422e71fde05ff7893ecf
font_01_sfnt_off0000df47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF47 11372 bytes
SHA-256: 9be0622dae6ba8045468356a4eb2778a6d516f925156a982ba600320181922e8

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