Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9ac9578a17ec75…

MALICIOUS

PDF

92.1 KB Created: 2021-06-01 17:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92c9df620800d9326405f2da9dce4d79 SHA-1: df460b35bc8b6db8bac9d0087abcf08a0e8c6c08 SHA-256: 2d9ac9578a17ec7501b4cf6440725574b9be9551ad06802eb9dadad909018f2e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a large link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the nature of the links suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/pbw?utm_term=download+bts+bon+voyage+season+1+behind+cam+sub+indo
    • https://teraxamexad.weebly.com/uploads/1/3/1/3/131380600/7d7a725.pdf
    • https://cdn-cms.f-static.net/uploads/4453102/normal_6029c71ca8fcb.pdf
    • https://static.s123-cdn-static.com/uploads/4483361/normal_5ffcfb11a47d6.pdf
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/vezovumimam.pdf
    • https://cdn-cms.f-static.net/uploads/4403428/normal_6043034df228c.pdf
    • https://zomereke.weebly.com/uploads/1/3/5/3/135397468/595a055d1aa.pdf
    • https://vumazilizulorap.weebly.com/uploads/1/3/5/3/135300666/fuzod.pdf
    • https://japujavawewiri.weebly.com/uploads/1/3/2/6/132696154/9296228.pdf
    • https://xiwitewikilimav.weebly.com/uploads/1/3/4/3/134371529/76e122b71d98.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://dijakezepo.pbworks.com/w/file/fetch/144441231/principios_de_transferencia_de_calor_kreith.pdf
    • https://uploads.strikinglycdn.com/files/7229393f-8f0a-45c1-947a-2da8ce47e322/taylormade_r15_hybrid_adjustment_chart.pdf
    • http://wixugigir.pbworks.com/f/lugebe.pdf
    • https://uploads.strikinglycdn.com/files/c16ccf2e-fbf3-4c31-8a59-8044c100491d/15971426774.pdf
    • https://uploads.strikinglycdn.com/files/9e3c68ef-b993-4445-aa54-a4fe4d1b7bbb/12092336991.pdf
    • https://uploads.strikinglycdn.com/files/fbdc0d29-5ac3-434e-8fda-c6b875073f98/2653550217.pdf
    • https://uploads.strikinglycdn.com/files/ce2787fc-29db-4a38-a153-66647992c5c4/vexabuposoruvofuzi.pdf
    • https://uploads.strikinglycdn.com/files/16ae64dd-1a8c-4c80-841a-b7aeb5cb3065/how_to_use_wordpress_beginners.pdf
    • http://dekokos.pbworks.com/w/file/fetch/144416838/zudarilotunaketa.pdf
    • https://uploads.strikinglycdn.com/files/10194440-1425-4afc-89b4-7b1f6cbc0cb9/ridixadokutajowimiwiriwo.pdf
    • https://uploads.strikinglycdn.com/files/a33068dc-da54-407a-a5fb-6cc28a5fecb6/73501495898.pdf
    • https://uploads.strikinglycdn.com/files/4dd2fc23-a033-4982-ba72-f9faed57b1ca/how_to_install_minn_kota_terrova_trolling_motor.pdf
    • http://ziduzobif.pbworks.com/w/file/fetch/144455172/amiodarone_hydrochloride_davis.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f9.bin
5a79bdc967e91905da55eefc102a88b3b023f141f3079103c79a270e500381cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F9 5628 bytes
font_01_sfnt_off000106a1.bin
a49f6e4ba7d8ac79c5d425eb5c49d369ae368973df92333716f73ab4ba8b0cca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106A1 5584 bytes
font_02_sfnt_off0001199c.bin
bb0f8f86655f279e72ce5ba680c79dcac949f0db5685d7ef5662e3347ffd7c97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1199C 10724 bytes
font_03_sfnt_off00013ebb.bin
38fcf4ea3c4064495b9c09a7ef6946f56b1194f5b917bad2175a3786c2c34ca5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EBB 16132 bytes
font_04_sfnt_off000153b1.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x153B1 4324 bytes

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