Malicious PDF — malware analysis report

Static analysis result for SHA-256 01bc291eec767955…

MALICIOUS

PDF

76.8 KB Created: 2021-05-16 16:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d5c032b0e1dd4c4cc00e8324c402b610 SHA-1: 97644da18a0ec9b25d6599917c685f64a6327272 SHA-256: 01bc291eec76795537f61416aab469e701e59d956a2a57c5fb2b427f14898af6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://xezojetit.ru/strik?utm_term=troy+bilt+2410+oil+change PDF link annotation
    • http://remont-pc.website/2089482050e2n4a.pdfIn PDF document text
    • https://cdn.sqhk.co/vemunaxudug/Vhedtr2/jejufazu.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/idJhdid/29234119536.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/ggg1usP/pusikademezowo.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/FgeLQjd/world_war_2_movies.pdfIn PDF document text
    • http://zibikudupe.mywebcommunity.org/bram_stoker_dracula_deutsch.pdfIn PDF document text
    • http://websecurer.tech/marcy_weight_bench_amazone06hw.pdfIn PDF document text
    • https://cdn.sqhk.co/lovojekaboxi/gpRBMAF/zuzixusonevowupex.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/82e26184-f3ac-4d09-b05c-9d042b86d1d6/konezubazanugotoja.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/labegig.pdfIn PDF document text
    • http://belibivizonojo.myartsonline.com/how_to_clean_a_canon_ink_absorber.pdfIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_bf4468ac5aa84f2ebd06dd1c9d57d5dd.pdf?index=trueIn PDF document text
    • http://wozitoso.atwebpages.com/vuvuveju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf67dcc2-d17b-4545-8eed-de5047c14986/simplifying_and_evaluating_expressions_worksheet_answers.pdfIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_36d78c399dc641b9a1bc61c02317dbce.pdf?index=trueIn PDF document text
    • http://fuvarijes.atwebpages.com/73181420981.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/27304231176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6bc1af6-7886-452b-89b8-705b4d816188/qu_es_un_autorretenedor_de_iva.pdfIn PDF document text
    • http://vajapojaperusu.myartsonline.com/42572660774.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_off0000ecf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF1 5488 bytes
SHA-256: 9c89a9ba1d2cc543881ef148e66cc5f2d65a9ea4c7524bc335753ab5343f0755
font_01_sfnt_off0000ffab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAB 11412 bytes
SHA-256: 220e1648e164027b01aa4c35afe9486d2ffa0f91dbb9664b5a294f8cf459e2c5

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