Malicious PDF — malware analysis report

Static analysis result for SHA-256 5912068cd8ad2b5f…

MALICIOUS

PDF

101.6 KB Created: 2021-07-10 14:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 32736ece9ec3ea6c03c5b0cb0fb58ccb SHA-1: 079da92dea96169d9d48e0022152aeb10306ebaa SHA-256: 5912068cd8ad2b5f437581cf38e05d5255d5890f26aa3bbac43a97e07de216c4
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites, indicating it functions as a link farm designed to redirect users to malicious content. The presence of multiple links on disposable or compromised hosting reinforces its role in a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160993e4e62a44---kivamemujozerupig.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/e1240aa493a12455b814f2af896e0685/tovixi.pdf
    • http://cerrutistudio.eu/userfiles/files/serisu.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ba78f67e88d05129bfdee2d96eac6d48/nivugafuzirojura.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/f8750359344048ba127d63ea52a1322b/62643271403.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083aba86c44d---23673043157.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/cd489jbehmsm44bj0o69tboiqm/sebaso.pdf
    • http://vietsonplastic.com/uploads/userfiles/file/16081293460.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b378cda0653---velubelabizefebuvapavurim.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a84c1a826b9---wudikezuwodet.pdf
    • http://baiduvpn.com/upload/files/40664487665.pdf
    • http://rasmesafar.net/basefile/basefiles/18435299207.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071532b4b6f0---25206187053.pdf
    • http://www.tomasjelinek.com/img/pub/file/xevog.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/7ec68aca1a71e4227b59a67da3ef8cf9/xagor.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/k894cnup014n2rp93t3lgf81h0/50054370101.pdf
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/71916524753.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/048fbe9de83e396d7a56feb99cc8511f/72530523083.pdf
    • http://thaoduocquyhiem.com/userfiles/image/file/nozuf.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608183ff8dca2---nababafotuxomamemuv.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/0d6906eb55a45ad8f6b32fe16e55f6c1/pekavapo.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3b92d49f1---85599478100.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b266a32899---48291902006.pdf
    • http://gtshotel.it/images/file/96457413888.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=insulator+dielectric+constant
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/5d2f25546081f65b8d8d57bbc0c2c242/zejubafopatuganawimovale.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_off000121c4.bin
df9b93aa97fef529aa27837d385b9d768cbc24fa8a0376eed0130bcd307caec2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121C4 10412 bytes
font_01_sfnt_off00013977.bin
4f087c8e0fe3706469a98684b7312d6ef49c6b97c5c3437a722a7afa3ad60ba6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13977 20832 bytes
font_02_sfnt_off00017135.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17135 16792 bytes

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