Malicious PDF — malware analysis report

Static analysis result for SHA-256 714c5a3b25382da3…

MALICIOUS

PDF

86.2 KB Created: 2021-07-16 05:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e4b7c7e38edf51154a324c9025774709 SHA-1: dff11f853d6a525e2f9e8afcd8ef61ea0272ec8f SHA-256: 714c5a3b25382da3bf035cee0d8d53d455e21b5af4ff7bbf3856d2d6e83baaa9
126 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress upload storage, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or malware distribution intent. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3513

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
  • 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.
  • 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://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d2967999c---pojaxunazaworetot.pdf In PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/ruzodipusuxareloxat.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16072e37873f41---35614125113.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/redipul.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/2h4oacn1vkeh4sh559br130mf1/87121697415.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3aead842c---76630763191.pdfIn PDF document text
    • http://antiochhighclassof70.com/clients/4/4a/4a4d67c83f6236388cbe8d22d68d4f91/File/jukiwadozomexixofofapajak.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/28474093651.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd36c449c7---pafogezini.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/wotopotis.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4d58522ac---20960327521.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e3ed86cddba---lamalagoju.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/62894936602.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/turomowawol.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943cc9c4ba1---mawediduk.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/7e01c4e03a6e0986fc1a11fb7ff50424/27772468801.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/222357296055.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/baduxemaresixud.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/kakokurudilas.pdfIn PDF document text
    • https://coffeetuanvang.com/Images_upload/files/lijuwanojetamusi.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860208bc455---8803570533.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/79680763690.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/muponexo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=canadian+tiger+swallowtail+life+cyclePDF link annotation
    • 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_off0000f38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 17220 bytes
SHA-256: 6949c8a17d9afcccc09770f40ea306e2cf66b4dcd16e513aa52e843ad8aecd13
font_01_sfnt_off00012086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12086 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001389d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1389D 10884 bytes
SHA-256: 2c5203938478d20164c3877fec33871951ed0b5b9484b088612258449f52e404

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