Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd294830183451c…

MALICIOUS

PDF

93.8 KB Created: 2021-06-30 10:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1e2aa83dc171eee105ea340c12ec462d SHA-1: e6f9e7b2805b3e35245ecc0da2a72930f8e86341 SHA-256: 9fd294830183451c7d7d59dee916b359accb4be19701d6ce86731ffd4a39f058
176 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to compromised WordPress sites or disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. No scripts were extracted, but the primary attack pattern involves directing users to external malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://mednet.mk/public_html/upload/userfiles/file/ditamabumupokaxis.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/a4e6f7747b13d85d0a5576d573d287d5/24964284930.pdf
    • http://capitolmetrophysicaltherapy.com/userfiles/file/jupan.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9c2743c70---8866468062.pdf
    • http://palyavalaszto.hu/teszt/upload/file/wupiti.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160afe879ab498---zuwopisuvapafedosewezexux.pdf
    • http://nwatchonline.org/userfiles/file/7823851060.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/99f9df2064d705fa8190d3d8051e3a90/wemosoriwozebu.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/fgv5ab07h72m4g2e5i9nqgaken/4431404868.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/66e49c39c2e447a2fe151f53d9870312/sasilusu.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9116254ba7---guvatenokumedaruraxu.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/mbpouo8l0290l8vs6nnfjg8ov2/22192141236.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0244c911f3---wigufog.pdf
    • http://canphantich.net/Images_upload/files/95588026293.pdf
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/v18ufj773ef86vpiabk21niobh/xipotuzoxopasopozi.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/599b3127ade3c5cc2753948071b4dd83/mesivowajem.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/2v1sbdgb003aq1cpkfvdsung93/86476023370.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/f8c90f07556eacd802cce4974a4586e7/29623974177.pdf
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/74924311125.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbd8365a25---tovetoxedakawukirogija.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/759952fa1f51dd5d873cd03672ca6ab1/kakarikunowenotigerixufal.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/89o5a1o3isdfkjdj7tqodsa11h/xewajogesef.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/ccdf67cad4849c76ecdfae33b6b937a5/muwen.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dae9d86bee1---kewuzij.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+beat+eater+of+worlds+master+mode
    • 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_off0001087a.bin
7f11993dabac55b20ace67c935d19fd112c2b69dc0b265d9a4b19590ed8bb383
pdf-font-stream PDF embedded font (sfnt) at offset 0x1087A 18504 bytes
font_01_sfnt_off00013993.bin
cb9b379245b16f363ac9c74e73c7014637a550df624995a270ea5a97ab76b2c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x13993 10536 bytes
font_02_sfnt_off000151ae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x151AE 16792 bytes