Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9662942d4c54984…

MALICIOUS

PDF

76.2 KB Created: 2021-03-04 17:56:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: a08f137dde02bc3f9f6e60d50a1754d9 SHA-1: 5dc3e578dfa494725007908e7f1c1f2c0ddb5111 SHA-256: b9662942d4c54984e210bc1f08d4bb4ef26bc400a66e53baf17a86fc1a4c8d1d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable or unknown hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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=no+fear+shakespeare+julius+caesar+act+5+scene+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375086/normal_601be21772eb2.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/56520216967.pdfIn PDF document text
    • http://fezatubiwe.getenjoyment.net/11794752576.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/92651136878.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/mfhbdgj/avatar_maker_anime.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386092/normal_5ff36198ee071.pdfIn PDF document text
    • https://cdn.sqhk.co/mozedizupi/hg7tW7d/protect_your_girl_quotes.pdfIn PDF document text
    • http://tujukesabegakom.mygamesonline.org/does_my_head_look_big_in_this_analysis.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/NXijTgf/kajatusumipelixovuzajexe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425504/normal_5fca20d08c5d6.pdfIn PDF document text
    • http://sibobovogulumu.22web.org/what_bible_says_about_cheating_husband.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/eaeaa917-d02f-4a13-af2c-08eb261b6b58/how_to_change_wahl_clipper_attachments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/474c5b48-53fd-4886-bfea-b08bcab16a31/62614956633.pdfIn PDF document text
    • http://bekelogamaju.rf.gd/89586793301.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/rival_ice_cream_maker_walmart.pdfIn PDF document text
    • http://vopapokolozanum.rf.gd/ashoka_tamil_movie_tamilrockers.pdfIn PDF document text
    • http://nufeluzuxaluw.epizy.com/92768745929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5e2acc9-2bdc-4031-9f67-579fed93e913/65219296585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/319cd512-96c3-441d-b393-1bec2ecc4d60/power_electronics_hart_solution_manual.pdfIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/did_hera_ever_leave_zeus.pdfIn PDF document text
    • http://wowijikozo.epizy.com/cinder_elly_book.pdfIn PDF document text
    • http://xabudavadeguvo.myartsonline.com/sekupakavejaxojad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/137c787d-efda-4242-a4e3-404012d770a9/nunipakavapex.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_off0000ecfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFC 5468 bytes
SHA-256: d596052a3126a3691257112abc7390b33f84d371ef5bbf2c14fe67e3dcaa82d4
font_01_sfnt_off0000ffa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA3 10208 bytes
SHA-256: 8d67c6b85c48c26f6ad2df70c24fc21f76f254a1c7f62ce13996ec54fe28f7f5

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