Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddabfba751ddf99…

MALICIOUS

PDF

98.2 KB Created: 2021-06-28 01:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 76acde3c89ea4fc6ab158a9091701d89 SHA-1: 93b491abd20f72e806f135af9abb58efbab3607a SHA-256: 0ddabfba751ddf9969f9ecf05b243412792654e3d81537734ad6fa3e45f69788
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to obscure the true destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f7819eab1---98652550289.pdf
    • http://zjhywt.com/images/upload/File/51342039905.pdf
    • http://ronniejoymemorialfund.com/clients/1/1a/1a75100f29d804137a154ca93ef51a80/File/57965371947.pdf
    • http://paillasse.hu/userfiles/file/21600443803.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724e6bb566b---xemojuzaj.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/c6j7g0tgpshlop2f5abo8c6bi6/giposezataverifewilukilev.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3f3e63ceb---59201809331.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbdbe1c4fb---wefagajuwajijikikev.pdf
    • http://www.derbysignandgraphics.com/uploads/file/kokapivamepumoratid.pdf
    • http://emannsltd.com/userfiles/nagutezaxi.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/qg6rllkh1l80maql3kjt7bkv2c/92608246444.pdf
    • https://bomberosdenavarra.com/userfiles_nexo/files/zefudusexavoxegomova.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609845b34a7b7---80497958054.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160783cb9185d7---zuselokikafuvopaxupiz.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d9d5ca1b74392a98a3ecaad0660e9edf/towejunabidekusoto.pdf
    • http://portalcom-b2b.es/img/user///file/_0536053001619977739.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160950f67471fa---60517602689.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/af8ca9c97e73fce76991b03eb3b38ae6/42426543807.pdf
    • http://purifoy2020.com/clients/1/11/118d8b7ee1ea4bab8fb19da95c56260f/File/banofabinesume.pdf
    • http://toyotaquangninh.org/data/dulieu/files/dazosejuw.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a76c52ddf0b---danuvusosijexawefi.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/41mc1dbvsqv35ei44vbg8vsmd7/90140662432.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/758ed3eed3faef8a6be1d8f3351f4eec/jekejidigexunajunetukomu.pdf
    • http://sevimticaret.net/userfiles/file/46133333298.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16080154052354---36724001746.pdf
    • http://mlsy.cz/images/file/files/55151333674.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=red+starfish+with+spikes
    • 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_off00012000.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12000 16792 bytes
font_01_sfnt_off00013812.bin
eb46191844ccad01d3d14916934b0113744a76541ad094a72db7aff374ce92f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x13812 16612 bytes
font_02_sfnt_off00016382.bin
3f6aba34f6e0ba19f3329ec8d8757fc5cdf486010ed46d076b4a321aacca0fa6
pdf-font-stream PDF embedded font (sfnt) at offset 0x16382 10548 bytes