Malicious PDF — malware analysis report

Static analysis result for SHA-256 bebcace5c66e85af…

MALICIOUS

PDF

77.7 KB Created: 2020-11-13 17:32:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1c984855c82e3d9e504c1b53293d56e1 SHA-1: 711c383bdc2a1a11f530ae1284bb5ccf4d94f96a SHA-256: bebcace5c66e85af2e09937b1cf780b27b5f23f78a45f600fe71ebaffbd26d9b
254 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding for a malicious redirector link and a link farm. The ML classifier also strongly flagged this document. The presence of a payment redirection lure suggests a business email compromise (BEC) or financial fraud attempt. While no scripts were extracted, the embedded URLs point to malicious infrastructure, and the document's structure suggests it's designed to exploit vulnerabilities or trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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
  • 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://traffmen.ru/123?utm_term=lodi+property+management In PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/bc8e74220360b5a.pdfIn PDF document text
    • https://dunefofitibo.weebly.com/uploads/1/3/4/6/134608320/sefupag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448984/normal_5fa3397a680af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f87031f470b1.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/zuguvoxoki/monster_truck_games_unblocked_racing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeaf132c-492a-4226-884c-941f4d8ff716/gasadumum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f223e3a-0bb3-41bc-90d5-82fb1b5bd53f/88160835517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eba28f3c-22be-4bb4-b4bc-8f5f2d155caf/the_art_of_being_human_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fefb63d7-4afe-40c7-a989-a1b9f4a62d7f/29390644919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9089deb9-b126-452e-9e40-56c7f0d56292/mamudiponifabuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/650f0c0c-5533-4db6-8a30-e3d7e91e3fac/desa_specialty_products_doorbell_man.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac2ac6f8-ab9c-4dd6-ad4f-97b77706ac9c/42245736940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5244b10-6d45-41c7-a342-dbc0ccf8c1ba/8838444410.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/hide_painting_of_sundance_ap_art.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_off0000f489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF489 5112 bytes
SHA-256: 7d08ee6d1280c54b22a44b14024821a4e16daff256e9a208184954a9016855dc
font_01_sfnt_off000105e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E2 10764 bytes
SHA-256: 74929575f857ae541b37a26ffce01ebd466e65a4d4e8b8dd552e640ae68dc8e4

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