Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc9ea3ea651fb03…

MALICIOUS

PDF

86.6 KB Created: 2021-06-28 03:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd379d125d90c02ac99675ee0d5b9dd4 SHA-1: 1f9658a888444644688b28f30cd024323ee1232d SHA-256: 0bc9ea3ea651fb032d4436a578aa109dc2dbb5c45c916e791f747a0041a2e24b
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDF files hosted on compromised or disposable domains, suggesting a link farm designed to distribute malicious content. The embedded JavaScript stream, though not fully analyzed due to obfuscation, likely contributes to the malicious functionality by potentially redirecting users or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://shoppingplanet.ro/ckfinder/userfiles/files/51621824800.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dcda511f2---zurijidubewisuvo.pdf
    • http://zaun-produzent.de/userfiles/file/19632641401.pdf
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210601013538802414u2g45d.pdf
    • https://tepihtrava.rs//files/15769008045.pdf
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/6a2a22ca9a60c6951822046b6cf61423/sozesalor.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/32d6b4c5ede6f469e9c078deca1d7cb7/39274221253.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607b52f8bf117---nuzoputivejajumijumine.pdf
    • http://tragiaocolamsapa.com/userfiles/image/file/88816438219.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8eaf91de34---zexofoxaziwi.pdf
    • http://eau-msu.ru/ckfinder/userfiles/files/ritowawigezeju.pdf
    • http://anatolianlgs.com/userfiles/file/ninulategonopavesigedug.pdf
    • https://oklogistic.lv/upload/file/43629173237.pdf
    • http://tokstar.com/_UploadFile/Images/file/movujozubowibijes.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/gj4bmig6pddckpdnavvdb53fv2/17050676529.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a78c50379---difeferuzakuzesefuw.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160afb7ef2c4f5---gonajolurenoxedokapulakeg.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bad8fd86ff8---16762715561.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084fddd6da42---17465796466.pdf
    • https://b2cexpressdemo.com/userfiles/file/metoz.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/erlvjnan83p3lag8v764s9a2p2/popimisukuxe.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/f6c307d6e93b7e12ec8fb47e3e9715e0/61530661553.pdf
    • https://flyags.com/editorResources/file///23418237581.pdf
    • http://www.cerel.eu/images/wyswig_images/file/14209447909.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=iphone+junk+mail+not+working
    • 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_off0000ee79.bin
40980488184557d8d345059a9de9dad5e3e75167413d30ac4dce7f650981d09d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE79 10888 bytes
font_01_sfnt_off00010770.bin
a8e8ff8b77329d2657158251956f4690dfee28e9a4f7e0f52451634706a4ee04
pdf-font-stream PDF embedded font (sfnt) at offset 0x10770 17360 bytes
font_02_sfnt_off000134fd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x134FD 16792 bytes