Malicious PDF — malware analysis report

Static analysis result for SHA-256 706f9ab43bc69398…

MALICIOUS

PDF

73.9 KB Created: 2021-03-24 22:55:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 106590f8355724c2eb37085848b4f600 SHA-1: c3fded0bc687b1773d99a846941f61822b0c532b SHA-256: 706f9ab43bc69398625a9056a6c89b71faaebe1eb56921705c45c0bea53d0eea
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm or SEO manipulation scheme, as indicated by the PDF_SEO_LINK_FARM heuristic. One URL, 'https://vilenefex.ru/123?utm_term=adobe+audition+cc+full+crack', suggests a lure related to software cracking. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=adobe+audition+cc+full+crack PDF link annotation
    • https://cdn.sqhk.co/jasurisunav/jdjaji1/recontact_london_app_store.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/hdijpje/fimobimab.pdfIn PDF document text
    • https://sivabujik.weebly.com/uploads/1/3/4/0/134017760/sujivakubolukuzib.pdfIn PDF document text
    • https://kagopibuxewiki.weebly.com/uploads/1/3/1/3/131398156/pisekimujamo.pdfIn PDF document text
    • https://wuwudaxu.weebly.com/uploads/1/3/4/4/134493329/7976856.pdfIn PDF document text
    • https://dusalunefawotof.weebly.com/uploads/1/3/4/4/134487283/numuxuvarazotaxe.pdfIn PDF document text
    • https://fitelibisubun.weebly.com/uploads/1/3/3/9/133987071/rigetukikadin.pdfIn PDF document text
    • https://juvirafiwak.weebly.com/uploads/1/3/4/3/134307718/jifadu.pdfIn PDF document text
    • https://kezidixujaroko.weebly.com/uploads/1/3/4/0/134040737/waliwij_bolujiwomejav_nefigukapelunu.pdfIn PDF document text
    • https://fanizoliboligom.weebly.com/uploads/1/3/1/0/131070566/gelafudenixi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_ebea62a9da664e33acfa8361822ca4d3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xipavir/caliper_guide_pins_noise.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/tisobukilutageponunata.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/kajivopizopiwerozib.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/58575535046.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/certificado_digital_certisign_v2.pdfIn PDF document text
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_928e1c56d31d4910bfb40aef08a8acd1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/25395288953.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/bhavageethe_kannada_songs_free.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_off0000e39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39E 5032 bytes
SHA-256: e7c7685890239901f4547ea54afb43d5224320fd2a9da8566bfc02a2680bdd67
font_01_sfnt_off0000f4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D0 11064 bytes
SHA-256: c43b0a0c7f658533558408e5f7a036ca58391836764a719a32902a74e2cf573d

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