Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa7ba68e1b8c9ad…

MALICIOUS

PDF

68.9 KB Created: 2021-04-06 14:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 405067aa0444ffbf71f0481cbc7a4031 SHA-1: c69cf1131fdfb12f8d6f120716ba2a1cd2a14c5c SHA-256: 0fa7ba68e1b8c9ada4085e3de6354b601fbdcfe520c4e103fa50bfa26b68fb7c
194 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm and potential phishing lure, as indicated by the 'SE_INVOICE_LURE' heuristic and numerous external URLs. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The embedded URLs likely lead to further malicious content or phishing sites, and the document's structure suggests it's designed to manipulate search engine results or trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://druttle.ru/wix?keyword=11+days+to+go+meaning PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479691/normal_5fcf5a9f508a1.pdfIn PDF document text
    • https://cdn.sqhk.co/bidelefo/Jkhbkif/92375583945.pdfIn PDF document text
    • https://cdn.sqhk.co/pixisuja/fhiggiy/star_wars_galaxy_of_heroes_for_pc.pdfIn PDF document text
    • http://farozemirig.scienceontheweb.net/piloting_seamanship_and_small_boat_handling_by_charles_f_chapman.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/H3gdDji/santa_claus_run_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lajefage/rX0jc2u/veroko.pdfIn PDF document text
    • https://cdn.sqhk.co/ratosakip/hf6Lk97/sikupezotebubagajewopuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_602a08ffe79b1.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/tomeze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459325/normal_603f76e096064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_601d910b51309.pdfIn PDF document text
    • http://vumajuzatijerak.getenjoyment.net/zawofinepif.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/mHgdhfv/vuravukop.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwopazeg/hchcnWL/azhage_azhage_tamil_album_video_song.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/oxford_latin_course_book_1.pdfIn PDF document text
    • https://cdn.sqhk.co/kagurase/ghcXqgd/smash_hit_all_characters.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://77701ba7-c5ad-4750-ab17-5b03548f7fc0.filesusr.com/ugd/9a242c_14b2316f2d9644cf858b93dd84cc2a3c.pdf?index=trueIn PDF document text
    • https://e8e87dc5-637d-47ba-9de6-e7d98d123d78.filesusr.com/ugd/a69a03_c8e43cc234404cf4ae6de6000322e22d.pdf?index=trueIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_575c0d94bccc427cbdd224caf917c5d1.pdf?index=trueIn PDF document text
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_2109d7f1d43146f891316f7af7ef5655.pdf?index=trueIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_d97a03997c404b63bf8513d438df8a2f.pdf?index=trueIn 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_off0000d248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD248 5076 bytes
SHA-256: 566fd43672c97a2744347828108c6c355086ac2239f6f2dd8b27ed4afd557b64
font_01_sfnt_off0000e38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38D 10236 bytes
SHA-256: 2e0a97c530cf14b66232a76a4a7bb186e5298b13db52f4b22d7c0ca6da2aba0b