Malicious PDF — malware analysis report

Static analysis result for SHA-256 c468232530b1aefc…

MALICIOUS

PDF

77.1 KB Created: 2021-04-19 10:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f6e23922ed0d2ef9c92ebe3f921c26dc SHA-1: 92912cfe2bbb402926bc9c592beb726b93eb343c SHA-256: c468232530b1aefcc9a37fe5248e54baae91ae8a4c775c14a54f8a4378bf233d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9956

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://soxebez.ru/strik?utm_term=libro+pdf+el+millonario+instantaneo PDF link annotation
    • https://cdn.sqhk.co/wofunukasu/jaiXgco/zinonuv.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/imihKjZ/7096342430.pdfIn PDF document text
    • http://meetsalle.xyz/88672336336wfcq7.pdfIn PDF document text
    • http://hookup157.fun/tojezanmt3g3.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/Qvig6V0/1582781396.pdfIn PDF document text
    • http://fajiwegoj.getenjoyment.net/buda_ensinamentos.pdfIn PDF document text
    • http://tronreserve.online/new_testament_vs_old_testamentz8i3r.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/69762183895r37v1.pdfIn PDF document text
    • http://pugezesiw.mygamesonline.org/runir_plusieurs_en_un_seul_document.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/jhjbgcg/zedevobelelejivutoxawuba.pdfIn PDF document text
    • http://valuburikodajad.medianewsonline.com/can_you_be_a_psychologist_with_mental_illness.pdfIn PDF document text
    • http://jipetabonitu.mywebcommunity.org/mu_cv_ting_anh.pdfIn PDF document text
    • http://paxenazubenib.mygamesonline.org/xuzosemigawaxilenuku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_697f78d0cbf94d7cb8625108e7039170.pdf?index=trueIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_02d457c1547d4142a3ec5147c7fe51a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vazisi/fipinafir.pdfIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_81a5f7b76ad54c76b1e5a561486911f6.pdf?index=trueIn PDF document text
    • http://woranuganavot.myartsonline.com/28091627695.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/31272501403.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/52909567357.pdfIn PDF document text
    • http://sokekakeloji.onlinewebshop.net/tasukopivegowovok.pdfIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_5d517d175297426b8a237759f36c87b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/49577718098.pdfIn PDF document text
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_289dcf4e80c641728bf61e8d2c7b2eb9.pdf?index=trueIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/wajibofadupakujafalane.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/avengers_game_apk_data.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_off0000eebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBF 5268 bytes
SHA-256: f6415dc12f508b851b461f5177cfc7bf51abfc582cbd9273051ef16fb909a953
font_01_sfnt_off00010088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10088 11352 bytes
SHA-256: 45cb91960c604c18c2e18043d14088ece32ef4b629ffeafed1264e4bbbfc2b1d

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