Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d465f3696dadff8…

MALICIOUS

PDF

76.2 KB Created: 2020-12-03 16:14:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9044ac3a795e7d4f9a74d78d3e32ce7f SHA-1: 0154c34accda7b6d805d2764a0ef8b5fca74af7e SHA-256: 8d465f3696dadff8978f41ccb7ca1a9a2c725f4657ba3af114bf7574ef7b5cee
214 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to image searches, suggesting a lure. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://traffking.ru/aws?utm_term=black+panther+hd+images+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4494435/normal_5fbc6fbc84799.pdfIn PDF document text
    • https://xakediripikevul.weebly.com/uploads/1/3/4/3/134338645/negiwawenaro_rileromejukizi_depelu.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/fejerupipix.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://s3.amazonaws.com/kabisebax/53375361428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e09b5a-abd4-41d9-870d-4255e46b4cf6/93120466814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f77087f4-c770-4eb3-b75c-e3e87fba4d79/f5_101_exam_study_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf538eaf37e3b64613f16/1606284602036/better_nate_than_lever_birthday_card.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c42727a199023ab4a3d3/t/5fc20b969ee0f32b879a23c7/1606552472612/43130349098.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/98769829128.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f73d1c8c741314321d77/t/5fc89894a9f67830caff279e/1606981781603/bidotavanopilikemefesu.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/zuxuxibopasofusodexol.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/william_thomas_homes.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/importance_of_learning_by_doing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df431da-1c01-4c81-b230-bf9d954af32c/frozen_pelicula_completa_gratis_espaol_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41781b99-65a3-4593-ae22-df432ea520d5/85771251843.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000ec60.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEC60 22728 bytes
SHA-256: f29dae51820c6b49e305f188db6b5489eb67b1204ae0575a599c24ed9a8fbb2d
font_00_sfnt_off0000b8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C6 5360 bytes
SHA-256: bcbf4e5db20442ee9a7d1e336417a15ff227485686ecdbc99c7788267074da55
font_01_sfnt_off0000cacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACD 9724 bytes
SHA-256: 6b68a6c1e122ed182181087691f4bcddb1e7cf5c9f519b62062e05fd24dfaca3
font_03_sfnt_off00011368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11368 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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