Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0362479953f581…

MALICIOUS

PDF

71.4 KB Created: 2020-12-27 11:54:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 0299eb2091d1b5d23aea03eb687611a0 SHA-1: 8df7c7e327c5ad8eb8238a71f1f1007abc7c224e SHA-256: fc0362479953f581ecd68a0a379493b04ce07fc12123bfa231592f02b8441775
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point to a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/aws?utm_term=bitterne+park+primary+school+uniform PDF link annotation
    • https://wosowabo.weebly.com/uploads/1/3/4/3/134340570/kikikafoma.pdfIn PDF document text
    • https://xuvarilanagore.weebly.com/uploads/1/3/4/4/134470983/doburami-tubuladeg-kozutoj-sasesumemi.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/bgfjjfF/monopoly_empire_card_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f89a361895c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476936/normal_5fe7232b09a70.pdfIn PDF document text
    • https://jifosibupegexuv.weebly.com/uploads/1/3/4/6/134692258/lipeligonaxajefi.pdfIn PDF document text
    • https://remitibomuko.weebly.com/uploads/1/3/4/8/134853657/womamulezarinukigiva.pdfIn PDF document text
    • https://nikevafojo.weebly.com/uploads/1/3/4/6/134680040/1e08bf5b70e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5fa08146503af.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/25d086b3-594f-48cb-b728-7c1f6aa30e92/steam_workshop_cs_go_skins.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d81a2f0-9379-42bc-84d3-5ddcb7403a4f/huuuge_casino_hack_apk_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f6ae01b-c981-4458-a203-cae2587e334a/pumonuzopojudikowugix.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_off0000da84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA84 5468 bytes
SHA-256: d5513cbf5150920d776ae8f14385a56e14b2355675af88dca3f7a48a89cc2cd1
font_01_sfnt_off0000ed05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED05 10576 bytes
SHA-256: 2e8bab1bb17e9d0f30505c74c30de09ff4b626d164815227d054e2f004213408

Open this report in the interactive analyzer, or submit your own file for analysis.