Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f10496f7afc54ab…

MALICIOUS

PDF

79.5 KB Created: 2021-03-05 05:55:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2425c812db758768537a3bbc1fa4780f SHA-1: 22997215c78e9785115abe8f4a892b69b4a23710 SHA-256: 2f10496f7afc54ab5efbacb968edf4cec9fff38d93f2ea479b22aa5c06d68e12
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though truncated and obfuscated, contains keywords related to diet plans, which is a common lure for such attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/award?keyword=keto+diet+plan+for+beginners+free+australia PDF link annotation
    • https://rowusebejaron.weebly.com/uploads/1/3/1/6/131637242/bowoditoboka-lenafivepebe.pdfIn PDF document text
    • http://bikokobolo.sportsontheweb.net/79073925500.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/me_before_you_book_series.pdfIn PDF document text
    • https://sejusidanixaj.weebly.com/uploads/1/3/4/3/134374441/pajos.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/vevibosuviwevelibe.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/xusifenapojigajimaxepilov.pdfIn PDF document text
    • https://dukopovofozevi.weebly.com/uploads/1/3/5/2/135295758/donelubixunilusisi.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/how_to_start_an_introduction_with_a_thesis_statement.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1b6fbac1-9b66-4609-9151-81f5d4c316f7.filesusr.com/ugd/5e81b9_121afa3089b646849b95f09a45e4c943.pdf?index=trueIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_66f8de777c5e45d491372545d2af5db6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/40242903352.pdfIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_bb9809d1cb5d4b66ac67ba22a7847407.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/learning_activities_definition.pdfIn PDF document text
    • http://bagugexasorip.myartsonline.com/pumupiwe.pdfIn PDF document text
    • https://6db1e9a2-4282-4636-8d41-de07325ad911.filesusr.com/ugd/d97b38_a3c34ae17d824ab09384fe7fa569f7f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/platelet_transfusion_guidelines_aabb.pdfIn PDF document text
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_43c8be6f127b4095bafddfc7ecaf00b0.pdf?index=trueIn PDF document text
    • https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_d309cfbbb21f48a8b29113ad45b38e6d.pdf?index=trueIn PDF document text
    • https://59b7e61f-9850-45ee-add2-e9646db267e4.filesusr.com/ugd/5b9365_6fc170e6d474476da62581d488b921b7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/dufiburepifexuj.pdfIn PDF document text
    • http://xekazaz.myartsonline.com/sudibadapanijetabevunus.pdfIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_aa15d9881e524e698a06aec78df5215b.pdf?index=trueIn PDF document text
    • https://013c3ecd-17dd-4738-ad87-554153c764a5.filesusr.com/ugd/36f25b_66fb2306c6cd468a9fe9e5317830ff53.pdf?index=trueIn 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_off0000faa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA7 5316 bytes
SHA-256: 89611cbff0dabebba75a136a9958bc49837e80a09cfe8759f0401d46113a70b4
font_01_sfnt_off00010cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD1 10472 bytes
SHA-256: e25d2edccbe1f458d1ae256d49ebab51e6e53f14d26c09b83c487b00e6696206