Malicious PDF — malware analysis report

Static analysis result for SHA-256 3312f88d8591c712…

MALICIOUS

PDF

81.3 KB Created: 2021-03-18 03:38:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 320a3bd56dc99e6186fc3c306a4dcbc3 SHA-1: 5e1f30676178828f596019021dc74060bb162c6c SHA-256: 3312f88d8591c71291eeaf90a47123e57d753a6bec66808e8917c7d55d6bc941
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://mezovuduw.ru/wix?keyword=livestrong+elliptical+ls10.0e PDF link annotation
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/6275b54cf6038e.pdfIn PDF document text
    • https://tuvitewolejuxow.weebly.com/uploads/1/3/4/6/134615754/3183426.pdfIn PDF document text
    • http://shoop-fl.ru/button_battery_chartsfmdt.pdfIn PDF document text
    • https://xeromikivato.weebly.com/uploads/1/3/2/6/132695960/7c358513c4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495040/normal_60328d640fb9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454281/normal_6027f3fc0b237.pdfIn PDF document text
    • http://tomandbxof.site/can_you_get_cervical_cancer_if_you_are_not_sexually_activejmaye.pdfIn PDF document text
    • https://denogowozule.weebly.com/uploads/1/3/5/3/135326247/lojumiliguzum.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/mifonijoneriturefenu.pdfIn PDF document text
    • https://dadojunolibete.weebly.com/uploads/1/3/2/6/132683289/c84bea5a7c2.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/bidalokofupuzudizelul.pdfIn PDF document text
    • http://fopekoriw.sportsontheweb.net/billetes_argentinos_para_imprimir.pdfIn PDF document text
    • https://zokesafan.weebly.com/uploads/1/3/0/7/130775675/wigozugelag.pdfIn PDF document text
    • https://jivikusobule.weebly.com/uploads/1/3/5/3/135326696/lenosazepuso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421612/normal_5fdd07c1e75f9.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/5713226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447497/normal_601af00a1cc18.pdfIn PDF document text
    • http://ellmax-site.xyz/40365975712jt29q.pdfIn PDF document text
    • https://mesowusiwa.weebly.com/uploads/1/3/5/9/135975120/7f54c.pdfIn PDF document text
    • http://pitushok.space/10767832946ye9x2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451228/normal_603b44b8da944.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://uploads.strikinglycdn.com/files/d5643f58-db6a-4435-be3d-db5d1e0a733d/laseguxisevitezurepivoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12206dff-1a11-4a5c-8824-b349cc3a766e/39704077314.pdfIn PDF document text
    • http://rowoniwetob.atwebpages.com/22844618497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9574212-a828-445d-9ef4-b94a66039684/film_location_a_river_runs_through_it.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4fc9afa-419f-4355-9575-4526bfbc5aed/fatubomema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dabe660-a977-4a03-8727-54cac13b243d/how_fast_is_the_camry_trd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF135 5116 bytes
SHA-256: 87a928b91a9f7346402e9eeb8fb48667bfd4e21f3b9773396b4b1a1d8cb1b3ca
font_01_sfnt_off000102b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B1 11408 bytes
SHA-256: 7876d53ee18ade01d443b68af4d7c13bb8bbecb14a619c5e4fd9d297e4852752
font_02_sfnt_off0001298b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3