Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d7fa6f116d6ae2…

MALICIOUS

PDF

72.5 KB Created: 2021-03-27 10:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c015871ff1e2935d11991b8463002c6 SHA-1: 151a4da3511e92fe576581fbc3a5b06b343f968d SHA-256: 79d7fa6f116d6ae211e38458b2dbf77a6144d86aaf9fe5428675709ed1cadb70
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, indicating a potential link farm or phishing attempt. The primary malicious URL identified is https://soxebez.ru/123?utm_term=dmaic+approach+template. No scripts were extracted, but the PDF structure and link farm heuristic suggest an attempt to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=dmaic+approach+template
    • http://mufezupep.iblogger.org/ilustracion_cientifica_botanica.pdf
    • http://nipodek.22web.org/13231862207.pdf
    • http://jelolizabuvixi.22web.org/momo_michael_ende_english.pdf
    • http://vafakewa.iblogger.org/windows_10_latest_build_version_iso.pdf
    • https://lumevukivejus.weebly.com/uploads/1/3/0/8/130874583/d1f1ba9e2c2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7572da12-d48e-44c9-b5b1-98ef2a090ce4/34176311425.pdf
    • http://podoremekuzepo.rf.gd/22776148182.pdf
    • https://uploads.strikinglycdn.com/files/62162f58-175e-4cef-b32b-fe38e7b4ab87/94210969338.pdf
    • https://uploads.strikinglycdn.com/files/72c69c03-b53d-4092-b243-39fdf3125e20/mivibakakerosinuxotaxani.pdf
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_fec73baa79db4588989f0d61d64c87b6.pdf?index=true
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_8a6ec08ee2724a89b3a7c2b087993ab4.pdf?index=true
    • http://xazemonubof.epizy.com/57627036922.pdf
    • http://tepaduvofevog.rf.gd/34458156169.pdf
    • http://jibovofafef.epizy.com/17666110027.pdf
    • http://gagaresereveku.epizy.com/ignou_begf_101_question_paper_2020.pdf
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_75239508ac2a4648b88295ebef139739.pdf?index=true
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_904ad596288540f7a6727028f7971b9b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4c2a96df-d7de-4080-851d-9f6a9b936f40/sodastream_fizzi_one_touch_sale_canada.pdf
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_6deff8ada6964539a9a7b5aaa3f55437.pdf?index=true
    • https://uploads.strikinglycdn.com/files/62b65352-762b-4348-b4c0-bbad2affea82/the_chocolate_war_book_review.pdf
    • http://dolufin.epizy.com/blanket_additional_insured_completed_operations_form.pdf
    • http://gobipubefosoja.epizy.com/despacito_lyrics_in_spanish_song.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de1f.bin
a5db551550fb44bf631081fcc0acc0135c566d7c48ac16046b28c22a32a0af39		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1F 4992 bytes
font_01_sfnt_off0000eeee.bin
f02e7b777f8a0f5c0587d641e00b6901fd0e3faf1d15b1f276550b6f582795f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEE 11484 bytes

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