Malicious PDF — malware analysis report

Static analysis result for SHA-256 edbea1f9578d8853…

MALICIOUS

PDF

91.1 KB Created: 2021-06-28 20:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f02bfa5c1d86b2e5366d07284b152e96 SHA-1: 557ab8f1f865f879039df6872e0c75fdde3cb743 SHA-256: edbea1f9578d88530217b23966a278cf4ae4dc461ca80420779b78c420204b62
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. Heuristics indicate this is a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160921bf2f1273---44393869155.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/kvdlt7rgena4u3i9b0qcnovur1/wekesubajerobutegesu.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16099adb243dd0---xaduv.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/e9f650231f0fbc091d5897bed831abc6/xekegu.pdf
    • http://sugarfree-gelato.com/upload/file/jipafopogurozezomeze.pdf
    • http://euro-ex.com/images/blog//file/milezutiv.pdf
    • https://nacionalequipamentos.com/ckeditor/uploads/files/fuzexuwi.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095cb6a54aff---popomef.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/ce7bbf7e9f2e17605c13e70e95556258/doxodalezusirumilisaruf.pdf
    • http://accomplishtheimpossible.com/userfiles_ati/file/99915205266.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/031714d0cde9aaf290088a0a555f088d/jujuxukibaledawevobenaka.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/bo57v4tg7c6taqpn2o9l8786d5/bopapunepeva.pdf
    • http://freeski.hu/freeski/file/mamixirubavadagegekineza.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/e06cd2d0f7ce11887d21dc0a991a6607/38227146066.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609fccf157aed---dixaxugawekakowumus.pdf
    • http://animationcoach.com/userfiles/file/6175123526.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/2743971972ac7d63216fbd4b880aabe3/92862249034.pdf
    • http://sivam.pl/files/file/40134528305.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607035914e79f---votikaxej.pdf
    • http://cs-golfclub.com/ckupload/files/76467040296.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f711d72fe3---15489338459.pdf
    • http://sns-russia.ru/userfiles/file/82131549793.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/e3d5410ef013a0583fa06abd1b6b6c57/64115488089.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=the+repetition+of+vowel+sounds+in+nearby+words
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010144.bin
b00b9079372fa2f6b7a3ad579d5e1f1e99ef152564d133ae552ed3694a15498c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10144 16960 bytes
font_01_sfnt_off00012d30.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D30 16792 bytes
font_02_sfnt_off00014547.bin
f868db37f438b63384e07c432ad8e03fdb26a84369286202af2db5d2794a09b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x14547 11064 bytes