Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f8b3bba3ddc9d3…

MALICIOUS

PDF

77.2 KB Created: 2021-06-10 16:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6421eb979a4b759eeca90c64e5ed4dba SHA-1: 54e2635a7de9f5d104987cae1dc9bea6594cf064 SHA-256: 64f8b3bba3ddc9d3e680e54264d4f1e17430996945ae2b8685db26b53a6e74d1
186 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to external resources, masquerading as a download for a game verification file. The presence of numerous external links, many hosted on disposable domains, strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://huntic.ru/pbw?utm_term=forza+horizon+4+mobile+verification+file+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491933/normal_60b843ca90afc.pdfIn PDF document text
    • https://pukewuvidepuf.weebly.com/uploads/1/3/4/3/134321324/sujorakagixasir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488807/normal_601f2c8cbbe81.pdfIn PDF document text
    • https://rogetaguw.weebly.com/uploads/1/3/1/4/131407632/a4d5a86fd4.pdfIn PDF document text
    • https://mazerobuwi.weebly.com/uploads/1/3/1/3/131398334/gabepaja.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/jukelisozofa_towosabifujine_pukowegoduna.pdfIn PDF document text
    • https://nekazadezi.weebly.com/uploads/1/3/4/6/134662300/9997498.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383327/normal_6000e50a79eaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391037/normal_600f52f45a263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494657/normal_60bd716ac874b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366302/normal_5fff0e009c635.pdfIn PDF document text
    • https://datuzela.weebly.com/uploads/1/3/4/1/134109276/lutevavatitupudesot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454172/normal_604f16cde5573.pdfIn PDF document text
    • https://veregatuvodomos.weebly.com/uploads/1/3/3/9/133997599/2135983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447079/normal_6062e4bce97c2.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/8dd44ee7-c97b-4734-bd3d-d0570e5a0f5f/alex_rider_tv_show_common_sense_media.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acbecd74-4b6e-4b1b-bbd9-3f6170919b72/tedibenenil.pdfIn PDF document text
    • http://midevodimu.pbworks.com/w/file/fetch/144678384/catalogo_bujias_bosch_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae41141e-9d08-415d-bdfc-10fe21dafbe9/44222821794.pdfIn PDF document text
    • http://wojipag.pbworks.com/w/file/fetch/144413409/rewadepu.pdfIn PDF document text
    • http://fokopaviwu.pbworks.com/w/file/fetch/144606873/vuwawijuzude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6066a0b6-1f41-4c8d-93ec-27f168430ee5/dyson_v6_not_charging_flashing_red.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_off0000eee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE3 5468 bytes
SHA-256: 3d497d104b3a5e580a614d922cc06792b0e43813802e489f5f650286060bbe72
font_01_sfnt_off00010175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10175 11040 bytes
SHA-256: a476479d8d858512445c4219f8fcf51d3d9d9c0f04ba6f00efc4437ec298e163