Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19550757347208b…

MALICIOUS

PDF

94.4 KB Created: 2021-06-26 01:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8dbdd00ddd4a73695496a2f760a0e8cc SHA-1: fac903e8b35700a44f114ce2291809c444e47800 SHA-256: f19550757347208b77c96729c709a357bd3d566b08d301453acdf8c50b155545
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the intent is to trick users into providing payment details or changing banking information. No scripts were extracted, but the overall structure and heuristics point to a phishing or financial fraud campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://krisoc.ru/uplcv?utm_term=taylor+swift+chords+easy
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/46vag9a1lg1aas8v5paq5b06er/31781019240.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ac40ievrh1qbmnnmn00a3lole7/2298821684.pdf
    • http://orderleesushi.com/uploads/files/fosejuja.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/9044f9d2c2dec52a6b2d08b96d381058/42436183393.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608018943c393---norakomuxojumidepi.pdf
    • http://nacyc.jp/Upload/file/beruvogolat.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608764ea7803f---xigamerepelizebuge.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093a67c8c1d0---86133741280.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092bb7da332e---vonexofifoji.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe121c55c5---nozasipubejifokonamez.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a77945a10b4---venorowo.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/6s6u5chb5gjjnajnmmlv32t6k0/xeponugegubeja.pdf
    • http://design-klasse.de/ckfinder/userfiles/files/36829663477.pdf
    • https://247hvac.ca/fabulous1/uploads/files/18359282789.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/c2a2e90503a210a1aa4d4590111e01ec/wonenutaberejudabefozo.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd7934b53c---samibivosagowisuzevetitaz.pdf
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/kumiteniviv.pdf
    • https://altaspin.com/calisma2/files/uploads/51605818080.pdf
    • https://elektrona.cz/files/file/xirekutijixuxubupewe.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/85e2j48sp57mlelfj77b6mqg0e/kokonewutelamunejiwuvub.pdf
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/lulukejoxaluwifaporojekev.pdf
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160789aa5de431---40021707908.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608402ad787e3---jomogopo.pdf
    • http://zhouzhuank.com/v15/Upload/file/20216201542105863.pdf
    • https://abofahed.com/userfiles/file/36706968521.pdf
    • http://robwalker.net/fckupload/file/webiketazobaluvagurodarem.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_off000104f8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x104F8 16792 bytes
font_01_sfnt_off00011d0f.bin
008b864e11ba9ada752638f3d6fbc944f97c1c4c2165833d023af00e9f4ddebe
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0F 10632 bytes
font_02_sfnt_off000135a6.bin
371aaf5367fc3f2591762ca0f41faa5885a81c088dcd8e43e073eb2d9cfef0f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x135A6 24512 bytes