Malicious PDF — malware analysis report

Static analysis result for SHA-256 b232f05c692908d7…

MALICIOUS

PDF

124.4 KB Created: 2021-06-26 04:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 250822970a8aa58c6223484d6ed7cc7d SHA-1: 123125cbcdca906c8e0067426ee063358d58ff52 SHA-256: b232f05c692908d7935190397027f34bc2d93093567ecf3854948c039b7aa618
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. The file's structure and numerous external links align with techniques used to distribute malicious payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://buildinggodskingdom.com/webcms/file/49743410940.pdf
    • http://geodeslaboratori.eu/userfiles/files/28663879576.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160905dd3e172b---xokafupapoxofon.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5874b8bb5---vuxojonapixebopag.pdf
    • http://haithuanphat.com/uploads/files/vefawetidokasele.pdf
    • http://gpe-el.pro/ckfinder/userfiles/files/69617613768.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/sq0f1jr955e0qvdtdr0e4oc7e6/17138523239.pdf
    • http://eltonltd.ru/sites/default/files/uploads/72391269712.pdf
    • http://clarksville.net/wysiwygfiles/file/bipelapapemig.pdf
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/27d1a7cdccee315750ed24085dbec210/pomikuvewem.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/aabe5b025e2035f8f75350cf681cc0d0/pefunigape.pdf
    • https://ludifrance.fr/userfiles/file/tigavepaladuxeregaxiv.pdf
    • https://cristalensi.com/public/File/wijukewokiki.pdf
    • http://davidhammerstein.org/userfiles/file/sedatexobi.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079988dab561---lodexazefolo.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608442564ba0d---51908223822.pdf
    • http://adamlegal.com/userfiles/file/59398048750.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9de7d591c---fipakese.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/m07to6hoapsmall41dnit5o0c2/995181190.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/802d1c1faa9e0ee7bcc436d3e5c0926d/dojonekurifatoradut.pdf
    • https://investmentskillsgroup.com/images/userfiles/file/16357862717.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60d5631202---letekuvoxurenetogi.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/3545752ee1a7189bc7e1a27bbf11b378/pokid.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7ccd58db7---ripazo.pdf
    • http://analogsys.com/uploaded/file/203666803660d1f9c175327.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=network+design+proposal+for+small+office+pdf
    • 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_off000185e3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x185E3 16792 bytes
font_01_sfnt_off00019dfa.bin
11e11dbe8835560285d45a4bd93957fef644a3351ce1a95970dfbac2d60e150c
pdf-font-stream PDF embedded font (sfnt) at offset 0x19DFA 11120 bytes
font_02_sfnt_off0001b7c4.bin
792bd964152f7809558cc8ee95d457ecc58b358fea0b71bcc4da516bcea466d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7C4 16832 bytes