Malicious PDF — malware analysis report

Static analysis result for SHA-256 488685ee4f9d54b1…

MALICIOUS

PDF

71.9 KB Created: 2021-01-19 15:14:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0334b5db03c372ef59497dc2d771df25 SHA-1: 7ba4f6b4a172360f9d26f226e6d426d11e23f4d6 SHA-256: 488685ee4f9d54b1d8256a0fb9f0a064747273abfab7f4c330abeb0d76df93fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URLs and the nature of the heuristics point towards a malicious document, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/123?utm_term=readwritethink+org+materials+persuasion_map PDF link annotation
    • https://site-1174179.mozfiles.com/files/1174179/slots_vegas_online.pdfIn PDF document text
    • https://site-1172346.mozfiles.com/files/1172346/3472698480.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/hfhewjj/zukemuriwuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/lakisitu/dNhfChj/47194583336.pdfIn PDF document text
    • https://seligelota.weebly.com/uploads/1/3/1/4/131453084/lixezolal_fazotuzixaberu.pdfIn PDF document text
    • https://site-1176262.mozfiles.com/files/1176262/horizontal_line_definition.pdfIn PDF document text
    • https://site-1173140.mozfiles.com/files/1173140/12323593898.pdfIn PDF document text
    • https://cdn.sqhk.co/worupageke/wiaigja/lineage_2_revolution_kamael_class_review.pdfIn PDF document text
    • https://lavupujewefi.weebly.com/uploads/1/3/4/6/134631736/mimox-dalotiketulow-witilut.pdfIn PDF document text
    • https://tudogaxutu.weebly.com/uploads/1/3/5/2/135295125/lupusulesoj_monefix_rezemutora.pdfIn PDF document text
    • https://vodoxuzet.weebly.com/uploads/1/3/2/6/132681632/lofarokiw.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/9ggQhbA/fawusigisafokiwukagonuf.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/dedinavesute/fafamujevukesowoz.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/deadpool_video_game_review_game_informer.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/tapaxuma.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/41294634981.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/buzabuwalilotutejezevefo.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/80637826477.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/38789691705.pdfIn PDF document text
    • http://likijanima.epizy.com/64756214626.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/vegifewosewesefelami.pdfIn PDF document text
    • http://www.readwritethink.org/classroom-resources/lesson-plans/convince-developing-persuasive-writinIn 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_off0000db2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2C 5568 bytes
SHA-256: bd708d944227b6485d4a67dd682c99d4d38ad404b7b7918f2fa1f8057e2e8903
font_01_sfnt_off0000ee15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE15 10532 bytes
SHA-256: 55e56de1d96220204686c93b747e3e8982b654804740c7acfbdf7a005ecdfc88

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