Malicious PDF — malware analysis report

Static analysis result for SHA-256 7504a4194316a437…

MALICIOUS

PDF

66.3 KB Created: 2020-11-29 00:05:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 947aca07a8bd987d9e7bc5207377556b SHA-1: aa3a32d499a49a313188910b3f6ef105703123a9 SHA-256: 7504a4194316a437f66f7fba13798cd70e529fd8f2f54475fbc3832e2542a337
274 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 links to known malicious redirectors and a large number of external PDF links, suggesting a link farm or SEO abuse. The presence of a password-protected archive lure and a callback lure further supports a phishing or scamming attack pattern. ClamAV detection and ML classification confirm the malicious nature of the file, likely involving exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffmen.ru/aws?utm_term=capital+iq+excel+plugin In PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/batagebexi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393511/normal_5fa5372eaa553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495400/normal_5fbb1e6eeda73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465389/normal_5fb58770a3b8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414169/normal_5fa706d82b60c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420766/normal_5f98e5ae5b9b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_5f90d39a85d09.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/9c446808-6538-4b69-834f-089deeb2dfd4/39962706012.pdfIn PDF document text
    • https://s3.amazonaws.com/xatojem/bytefence_license_key_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/jixeguxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f5397cf-7d1b-4669-9c10-e64f9222a002/exercice_excel_2010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beb919a2-0964-4e21-96f1-9e0523738224/bar_x_ranch_angleton_tx_flooding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d3d9da-534c-4a3a-bfba-1fc45a162dbc/tech_2_scanner_equivalent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a54b04eb-18b6-49eb-a794-017e49ed48bd/naxixoxefizevagalevopa.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_off0000b930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB930 4816 bytes
SHA-256: 64d3f21585dc585461ae18458bb589d9345c8f11cd7a29f4167078a5a19fff71
font_01_sfnt_off0000c9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9AB 10952 bytes
SHA-256: 9722d3ba90cd43df91e9103668b1ba908fc65ac125c046e2ed0d51419e6aef77
font_02_sfnt_off0000ee96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE96 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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