Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f667a61f0fa665f…

MALICIOUS

PDF

84.1 KB Created: 2021-09-19 00:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2262241747ba82fef735752e3b3978ed SHA-1: 62255d3713584f82a2d852349980dcdb2c982456 SHA-256: 0f667a61f0fa665febdde2363792d33de455fc44cc095dedaff9937144ce8ebd
204 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to potentially compromised WordPress upload directories, suggesting a link farm designed to host malicious content. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content likely attempts to trick users into changing payment details. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/ruguzugodur.pdf In PDF document text
    • https://balajitutorial.com/admin/userfiles/file/wujenavoj.pdfIn PDF document text
    • http://noahmission.org/dataroom/file/masidonelinemekud.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/16177631133.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210912_B4199A793BFCD5BE.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/botalem.pdfIn PDF document text
    • https://strings97.hu/userfiles/file/xifotibakiduzalilutizara.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/34443756196.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/33668bc868e0302fb8ce5fde3ebb2164/49441826895.pdfIn PDF document text
    • https://aluvioneschicamocha.sinecsas.com/ckfinder/userfiles/files/52403566674.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/rukumazij.pdfIn PDF document text
    • http://mamam.by/upload/File/file/42270882387.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/kogoxegol.pdfIn PDF document text
    • http://viettruss.com/upload/file/viwos.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a519da4b9e---pisefukatija.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/7ce8a9400ed513513853e3a4011c01a8/jetipasarajafewiguxelo.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140ef6a358a7---38192840850.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/xibisamopijetifugubase.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210909075432.pdfIn PDF document text
    • http://gordostcrista.ru/userfiles/file/33858906563.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/32714798696.pdfIn PDF document text
    • http://sor1310.com/userfiles/file/repodidijazok.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/37015193139.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/84490072580.pdfIn PDF document text
    • http://syntra.pl/userfiles/file/84124761881.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/42125148179.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=filmy4wap+web+series+2021PDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE335 10780 bytes
SHA-256: 6593e1667ff71068bbf2a8228d9d3d857c102b5ae5f7e1485b2f9f0eec4892e9
font_01_sfnt_off0000fbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEF 18204 bytes
SHA-256: 730366fd595e2cb1a0d1f9df356932b9d4ca99757f0c1f3746e385968214eff2
font_02_sfnt_off00012aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1