Malicious PDF — malware analysis report

Static analysis result for SHA-256 372d6541998463a5…

MALICIOUS

PDF

107.6 KB Created: 2021-07-06 15:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 235e00e594135e90dc41449668932e3d SHA-1: 086dda29f03cfc2f3f123ee73ba4a843714c4e54 SHA-256: 372d6541998463a5df978a361804483e4fd336ce25abc3ee49e4b2fa6fcc82b6
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://brickbodysupplements.com/newerac2c/userfiles/file/lafaremutabenif.pdf In PDF document text
    • https://aiaciran.org/cache/fck_files/file/47971285766.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/76821844806.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160837b9e9b6c9---21529806240.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7ee98b0b2---78668189642.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/tujinetelivupopapep.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65e0199480---fosukesalesifemuxune.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/tixupidadol.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/0af14fb0ea5ddf63a0757f34ba9c49cd/81163070296.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/aa828004b2ef53f02233cf2ffe918259/rusokemewunuxuxeb.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160822e66ae006---kidivowa.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b54b2a61d6---94203858377.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/30698606153.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c491e31dc---levamubadofiwudebo.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c724e74a9bb---dajev.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/22094845759.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/89160000010.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/b08d5ba1fed0513d37c1300b4545d595/59948118210.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa9240850f---54631925589.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606da5c20fd05---74161886779.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160785241d7113---53217381798.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1900160b2f---pifazejur.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/dimatebu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=now+you+see+me+full+movie+in+teluguPDF 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_off00014195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14195 10636 bytes
SHA-256: aebaed3e490609b5653f9b2831f26ec7f3f7ed508455fb7b42a47682fe38dbd4
font_01_sfnt_off00015a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A03 18552 bytes
SHA-256: 4474ece5baa7c3811b43f5800fbc308454879f4f89be5842f6512d17bf569bcd
font_02_sfnt_off00018a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1