Malicious PDF — malware analysis report

Static analysis result for SHA-256 296378d5b3c9653f…

MALICIOUS

PDF

77.3 KB Created: 2020-11-24 14:58:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: bce3593600867f4ec4322a658a67da76 SHA-1: 369036f8e026f1e93a51b0a092fd9a56c560fd52 SHA-256: 296378d5b3c9653f65e11fa5579a8d291e74fdd3c3ff6a34734ceab8dfe6c4e4
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier, and contains a large number of external links. The primary malicious URL, https://traffnew.ru/123?utm_term=tempests+and+slaughter+tamora+pierce, suggests a phishing or malware distribution attempt. The presence of embedded JavaScript, though not explicitly detailed in the provided evidence, is a common vector for exploiting PDF vulnerabilities and initiating malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/123?utm_term=tempests+and+slaughter+tamora+pierce PDF link annotation
    • https://dupizonax.weebly.com/uploads/1/3/1/3/131380343/3d147e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419437/normal_5fa6f383b372d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448720/normal_5fa0d43da7d12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402261/normal_5f93d3fc2a073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492600/normal_5fb2dbf584bc3.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/747afc98-ca48-4000-95e3-3db481c76c3d/nulemulalunozaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de60c6f-ba8c-4df7-ae99-8943e1f3004f/que_son_los_pronosticos_en_administr.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/cracking_the_sat_physics_subject_test_download.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/regos.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/stoichiometry_worksheet_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2455fb25-1a50-42d6-8a3e-c73451891879/64045402715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6131809c-b207-4ab5-a660-3894af55bf3d/26156310100.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_off0000ef52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF52 5436 bytes
SHA-256: 0d5b38ce2966ac9d38c19188f71db17cf6ead61b2e8f97041d3c5f8771a8f5f3
font_01_sfnt_off0001019e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019E 11560 bytes
SHA-256: d7d1e7f720da82903353864f580486eeca6be554dbed0cc8e50e21131307afb3

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