Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9e4704e3550977…

MALICIOUS

PDF

89.9 KB Created: 2021-06-27 02:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9f437b80a6adfba283b47840eee60c8e SHA-1: a2262a03cc91e7dc9ddfc4a96251425df668dd8e SHA-256: 2a9e4704e35509770106ffa7a31373f4ad31c96d277808434b713f801404eedc
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a callback phishing lure. The document body is unreadable, but heuristics indicate it is a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to host malicious content or redirect users. No scripts were extracted from this sample, but the presence of PDF link farms and the callback lure pattern strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ccsl.asia/files/19253273703.pdf
    • http://malbreil.com/userfiles/file/58432529658.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5b9915c02---wiwekekedopepupisuni.pdf
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105110426463994.pdf
    • http://filatelianumismaticaumbra.it/userfiles/file/92971774552.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16076d2abb4369---69667722691.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160953d052dc99---31339139565.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16094bd2d47844---40323958651.pdf
    • http://cyklo-sport-servis.cz/UserFiles/File/kanumonasiziveno.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160afd784ae7e0---makosogugilewegu.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160796fd5ad49b---34006222026.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/qoi7b2ssnlijn8l1r3l6ab4379/besitabubepasitawuri.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa779fdc577---zigibemusuvuribitulepemed.pdf
    • http://alimentosldm.com/userfiles/file/zukezipunowebe.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608203fbd2b8d---89356283474.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/140b274a772dd7ff1f1d35a8f80fe508/30719482278.pdf
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/gcpacurcsq017q61hskshhoil6/90715441673.pdf
    • https://incoyun.com/calisma2/files/uploads/kepasufafenezuzanip.pdf
    • http://trustarshida.co/cache/fck_files/file/20470654130.pdf
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/omig36rtq4hgejnt0e9655cbkp/rupokaxujolov.pdf
    • http://hy-concrete.ru/d/files/81550574833.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/18mdms75hfhggshq5detdlio27/6541462430.pdf
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/daju93f1un1u48v004bngcg8cv/65462147003.pdf
    • https://atphp.ch/userfiles/file/53709385295.pdf
    • https://bobecoingatlan.com/uploads/editor/file/nepagigutumusefexugumomik.pdf
    • http://donauwell.at/userfiles/file/19229360921.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=physio+therapy+clinics
    • 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_off0000fdcb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCB 16792 bytes
font_01_sfnt_off000115dd.bin
137f36c79c39b7ab54f756b582448ae055bb2ec61838514a2ecbe83c232edbb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115DD 17000 bytes
font_02_sfnt_off000141d4.bin
3c6bd455b73b07976ff48bab88ee2478378aa005590b42c41a0e46bd7a413193		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141D4 10588 bytes

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