Malicious PDF — malware analysis report

Static analysis result for SHA-256 976b19734432d741…

MALICIOUS

PDF

75.0 KB Created: 2021-06-06 01:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cf760536d869548b2834462b0adefb4 SHA-1: 4c77a8f5170b942735a00abb053e2eacbcc37a5b SHA-256: 976b19734432d741d47da9b93a3fd8219150545a9134a578465c6558cbb00e76
204 Risk Score

Malware Insights

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

The PDF contains lures related to 'rar password remover free download with crack' and a large number of external links, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document's structure and embedded URLs point towards a phishing or malware distribution scheme, likely involving a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://irlanc.ru/pbw?utm_term=rar+password+remover+free+download+with+crack
    • https://kenufipafalenar.weebly.com/uploads/1/3/4/6/134616414/1783052.pdf
    • https://tetekejitinile.weebly.com/uploads/1/3/4/5/134584465/dipolutawebe.pdf
    • https://cdn-cms.f-static.net/uploads/4475571/normal_5fd9cac21be6a.pdf
    • https://bimeriwuju.weebly.com/uploads/1/3/4/9/134901074/pagibowi.pdf
    • https://lurenosofen.weebly.com/uploads/1/3/0/7/130740325/femewumafijuf_waxifulube_sateke_zizem.pdf
    • https://melilavopizef.weebly.com/uploads/1/3/4/3/134330973/8d5109f0cd447.pdf
    • https://linajijokib.weebly.com/uploads/1/3/4/0/134000065/dilomekot_sepudupeleko_vusubeb_vejefimaji.pdf
    • https://cdn-cms.f-static.net/uploads/4472188/normal_6062d1ef59c21.pdf
    • https://nizikalod.weebly.com/uploads/1/3/4/6/134605229/8890702.pdf
    • https://furivupes.weebly.com/uploads/1/3/5/2/135295821/280664.pdf
    • https://ladofozaser.weebly.com/uploads/1/3/4/3/134334290/3149814.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9a9418de-0908-4564-abc3-18cad4500305/lazarillo_de_tormes_tratado_1_english.pdf
    • http://foxobekizax.pbworks.com/w/file/fetch/144465960/75988524814.pdf
    • https://uploads.strikinglycdn.com/files/c40a1451-c95d-4ce3-8ca1-7d07a4f5adb9/47370437257.pdf
    • https://uploads.strikinglycdn.com/files/d98d4e22-e8a7-40ca-879f-c3b5305fa072/91803864550.pdf
    • http://kuxuraroj.pbworks.com/w/file/fetch/144676212/code_de_la_route_usager.pdf
    • http://zufogopojut.pbworks.com/f/tiposujirijowutupu.pdf
    • https://uploads.strikinglycdn.com/files/3e153524-c809-439f-b366-482b76eb1b4d/kofoxelodelesimaverel.pdf
    • https://uploads.strikinglycdn.com/files/78b204b5-57c9-4488-adf6-fc4f4c7b8979/3091663558.pdf
    • https://uploads.strikinglycdn.com/files/5a0e0f42-b1b3-4c9d-ad80-c0f59f105fa6/miller_211_review.pdf
    • http://sizolasipape.pbworks.com/w/file/fetch/144575181/simolebanoxadimedu.pdf
    • https://uploads.strikinglycdn.com/files/afe72edc-351f-45b0-bf58-566ea77ef491/best_business_math_textbooks.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e566.bin
f14b28d005564236ca89ed647cdd8f5c5417e4d75439a2cf9128f806cc917242		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE566 5616 bytes
font_01_sfnt_off0000f872.bin
61a87a72ff19e8691d6ce1b0190607cd892abedb06f56caf9c1baa43c0353c7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF872 10640 bytes

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