Malicious PDF — malware analysis report

Static analysis result for SHA-256 faba51e89fcdf152…

MALICIOUS

PDF

71.7 KB Created: 2021-03-24 05:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c81e8fff0b27996ccad4de4b35354eb6 SHA-1: 24492e6712a5c7583cc0db2a4463ce09ac97b1c9 SHA-256: faba51e89fcdf1524f30a1e80011931f2014158e57d8b5899dd4fd1491356a37
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, embedding numerous external URLs, many of which point to disposable hosting services. The document's structure and the presence of many links suggest an attempt to manipulate search engine results or to distribute further malicious content, potentially disguised as templates or documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/123?utm_term=database+design+document+template PDF link annotation
    • https://xiridibokolu.weebly.com/uploads/1/3/1/3/131379099/damojibevafiraso.pdfIn PDF document text
    • http://juwoniki.getenjoyment.net/voladepebawe.pdfIn PDF document text
    • http://mezajozugabaso.getenjoyment.net/1784861599.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/sotazaturirigafoxex.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/69779200672.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/ecological_succession_model.pdfIn PDF document text
    • https://wefidabewurar.weebly.com/uploads/1/3/1/1/131164485/be51a5ec71cfdcb.pdfIn PDF document text
    • http://nuwojukow.mygamesonline.org/93101536545.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_8dc399dfa51e403e983cccb92671bef0.pdf?index=trueIn PDF document text
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_b99bf99319c145cba706689d3228a648.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d6f82b-89bb-4509-8285-aa31d4301f61/22925217885.pdfIn PDF document text
    • https://7920a853-f458-4dfc-a893-f50c3ed6f780.filesusr.com/ugd/fe7850_215ad7156b69464bae615e372fa4ba74.pdf?index=trueIn PDF document text
    • http://miganuvag.myartsonline.com/atkins_physical_chemistry_9th_edition_student_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d549da3c-fef8-4d7a-9f8c-8a1e26f951d8/frm_sample_questions.pdfIn PDF document text
    • http://vavubal.epizy.com/skyrim_bruma_quest_guide.pdfIn PDF document text
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_0adeb654fcd14d388e0dfbb025d54dcb.pdf?index=trueIn PDF document text
    • http://zunijakokusageg.epizy.com/agenda_semanal_2020_para_imprimir_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/588ab369-7b9a-40dd-9b8c-49103452b08b/how_to_replace_ink_canon_pixma_mg2520.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_off0000dab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB1 5436 bytes
SHA-256: 50953f1052b31ca5ded69c12b85c872683259bf9b109f5c0a329abd36a2f1b6c
font_01_sfnt_off0000ed20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED20 10832 bytes
SHA-256: c9c1e96b16340ef1c9752b4b397bcc811f291d8c8134debc091ee16a8ae3f014