Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df749af62fb9641…

MALICIOUS

PDF

101.7 KB Created: 2021-06-28 21:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 33c1fc28d5c3cc1ba20715f0889c9fdb SHA-1: 938df5d40f026f4bb7b6dec71b521dcfd34c1664 SHA-256: 1df749af62fb9641a5d95884b5811b88a1b66bfab27578067dc3acca7674f919
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure and URL analysis point to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

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 http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877f59aa643---forobefososekadid.pdf In PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a61288dd5---79249010372.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a2b15de98---jodadujifa.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/zoluxosepikevesa.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/bogitidudigoxo.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/00a246f42e78f693c23ec01b13d99c3e/panadapev.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/bdf35315325b1096c8fe4d78f107e228/ditixir.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/rqok6u6t3f3ehc988rand2n8k7/kizabuxuzi.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606efb41e3cab---92508512119.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e08b802ca9---78955621365.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/sgrpb7bmrdi41gs85ib004eamc/23602443872.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/k5m5ea3eeb103ibocobrvhu7je/46974485693.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/tolazegiz.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842371f011f---zuworugalegakomowob.pdfIn PDF document text
    • http://byecook.com/ckupload/files/93545656884.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0334e7fa5---fonexabupokuxun.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086eacaac0b4---pilomineweduziduke.pdfIn PDF document text
    • https://campermagazine.tv/public/file/vufulip.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/74520123948.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/53636241953.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/29c07827cda2c9b46973928974961bc3/3527543450.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/3481095a40d3b92d4cdb612514ca0ab6/pemotoligiwiruver.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/89821920225.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/pe56p6fjtbobt2hemm67vprnno/57387776126.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=god+created+these+on+the+5th+dayPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000125fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FD 17268 bytes
SHA-256: a34912e55a535c8c003d310dcb0e88cd8d68015a4179c23d8dcde1f4ed699bd5
font_02_sfnt_off00013fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC7 18124 bytes
SHA-256: 0eb45c56ff090e3b4d8b6cc06f2563f800e902d5c5ee3c1ca0157d0f0a899538
font_03_sfnt_off00016ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EBB 10616 bytes
SHA-256: 9e979a762b1b7465e3fd4105826e18eb6a405fc61588ac6bde8790ed7bfa491f