Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d07f9872963277b…

MALICIOUS

PDF

85.3 KB Created: 2021-09-07 12:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 00faebc287b9216192b42d1b3adc66df SHA-1: 5756294a0f65188a48c254c5760020b517ae42fa SHA-256: 2d07f9872963277b16baaa47ee40652445dd19c186788fe852d9bbf9c5428557
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple URLs hosted on compromised WordPress sites. These links are designed to lure users into downloading further malicious content, as indicated by the ClamAV detection and ML classifier flagging this PDF as malicious. The primary attack pattern involves tricking users into clicking links that lead to potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613009935a55c---65941061390.pdf In PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/e5c41b9e32e616d1ac724963f5dc715d/nujanipabefemikapok.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/7552008980.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/a338f21cebbca5397f8280712a0ae6a1/gibufobogezoson.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/34332470671.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160786b52cd993---lugale.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/39218827947.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/81317867131.pdfIn PDF document text
    • http://www.ezmoving.com/file/71219139311.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e150f25fe8---96179095105.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/27625723490.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/9b771b3eeb86665440ae3e14b5011e4b/84131110604.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/mexuvaxiruzaludukumageweb.pdfIn PDF document text
    • http://nguyenquangcomputer.com/upload/ck/files/59687810202.pdfIn PDF document text
    • https://shiphangnhanh.net/uploads/image/files/74492951603.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/5f0edae5fecb8635de56dd7e7f2eef01/69655351861.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/c7ao04bse8i2i9c6h3jmfdk236/nokivazupazoxovok.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/94bf19e57d4fd66fc88021d69659ef14/xatovedonefuduv.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/90410440638.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161330428e6644---jajoberirokeruzuvo.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/41644686135.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/73043537762.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60f4953f88---xulefidamexoko.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/beveja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=google+docs+to+pdf+onlinePDF 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_off0000e91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10131 17976 bytes
SHA-256: 345582a5ba81881d22eab15767ec6e98285857c1f1f572c881384c1856c31c2e
font_02_sfnt_off00013004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13004 10572 bytes
SHA-256: da644d08ebc8e6b57e4230338192996d692294ef558f4db2df018e7e41f3ac80