Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6caa7c3b721266…

MALICIOUS

PDF

175.7 KB Created: 2021-04-02 04:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4c0a2b42c621c23d01c87dc09fb124e SHA-1: 9c0d213d3ef2e484050ff68c3b4f0ce9aa40cc16 SHA-256: 9e6caa7c3b72126680502c6f723d121b5079e792fba7548b9a18b8b589adcec8
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to host malicious content. The primary URL, https://vilenefex.ru/wix?keyword=avaya+one-x+9608+phone+manual, suggests a phishing or scam attempt by impersonating a technical manual. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://vilenefex.ru/wix?keyword=avaya+one-x+9608+phone+manual
    • https://static.s123-cdn-static.com/uploads/4409811/normal_5ff1d8913865b.pdf
    • http://kozugufasuroti.mygamesonline.org/libros_sobre_canales_de_distribucion.pdf
    • https://cdn-cms.f-static.net/uploads/4468274/normal_60293c905df37.pdf
    • https://cdn.sqhk.co/fupetabuwuf/HjewQid/music_humood_alkhudher_kun_anta.pdf
    • https://cdn.sqhk.co/pidodalatip/jj7LDie/wimesobifomedaz.pdf
    • http://nifimoperokoj.medianewsonline.com/turaruvelosu.pdf
    • http://gekifek.scienceontheweb.net/satesebone.pdf
    • https://static.s123-cdn-static.com/uploads/4378379/normal_5fdfc4d6a5557.pdf
    • https://cdn.sqhk.co/fudixaxogub/IAKPia6/guess_the_word_offline_games_for_ipad.pdf
    • https://cdn.sqhk.co/bizujutenifo/iahThha/39644855397.pdf
    • http://tapopapebesawu.getenjoyment.net/meconium_aspiration_treatment.pdf
    • http://tixaman.scienceontheweb.net/ugliest_boy_in_the_world.pdf
    • https://static.s123-cdn-static.com/uploads/4466661/normal_5ff112d259713.pdf
    • http://venolilixe.mygamesonline.org/86930688585.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zaxawetawupo/are_we_slicing_the_pie_correctly.pdf
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_73c35f2c4ffe42038c8f5bac1c575358.pdf?index=true
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_f001f4145ff34272a3458057e8400b4b.pdf?index=true
    • https://s3.amazonaws.com/rorives/14201471188.pdf
    • https://s3.amazonaws.com/perurulexi/81732100195.pdf
    • http://ligiwekuxote.myartsonline.com/fofodubefukiz.pdf
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_cfaed48162d14822abcdd73106ccdaec.pdf?index=true
    • http://satawakerexe.atwebpages.com/xawibejipadelefuguj.pdf
    • http://sazoser.myartsonline.com/babedovuvarizene.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a95.bin
afbd3abb47fac90795ed86a05892a4c7f0ca269129c7e312a1673eeaeb23be2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A95 115904 bytes
font_01_sfnt_off00026128.bin
f127ef2cef6a67e27388ca3f46cdb758cfe357000d5d325457ebe74f3d2322f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26128 5680 bytes
font_02_sfnt_off00027471.bin
7d8bedc02fe80431b0df5943974220f2a05d22cadd7e1982613dc8cf20c982d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27471 11284 bytes
font_03_sfnt_off00029b25.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29B25 16204 bytes

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