Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f842cf87f7cb160…

MALICIOUS

PDF

107.1 KB Created: 2021-07-02 06:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 59e72066e59b6c3c10948d08fb9b1c22 SHA-1: f551f599720837e0009fc1c6e23772e5fe4b4073 SHA-256: 9f842cf87f7cb1607c223b167564ccc1490aa2afbe4054ae0b510d227ea1f893
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories, suggesting it is used to distribute phishing content or further malware. The presence of multiple links to potentially compromised sites indicates a broad distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c091b5bd799---xizidazasowonekogetujiz.pdf
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16243564844429.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/1c6f116daf860ea302b6d5303e21638a/difizesenunutigikenij.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4eeb322da---86686573363.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160d5186ddc627---68240305505.pdf
    • https://residenciasanamaro.es/userfiles/files/18172178932.pdf
    • https://cfbadalona.net/ckdata/files/55797111051.pdf
    • http://mp-journal.com/media/file/tofulujedarizobavumijus.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/4f5cf8e1c1f3fc67364821b050d902d7/jobumari.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/bee2c38ec5acc2dec28b43098b715b59/98378181033.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/6aabcee9212ed787a10af30e13b26909/9452500756.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075cb63dec0d---rirot.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c0b333f97---87224663238.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093e74683f0b---mogawezujefujasopuwal.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb94bdbce4f---15362602837.pdf
    • http://grandchainfamilyfoundation.com/clients/85333/File/terafamupetu.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/8stu3dv53sj4pappd8pe0g532m/26073895272.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b52658b6b36---wemozurorunubukakoxof.pdf
    • https://its-bulgaria.bg/files/file/bejetupa.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070479678270---92568917084.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/v9q7lo4ngijq8qu1l8r0blug34/6746695071.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4242c5d3a9---givapepopofibidoxonaf.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=countries+with+the+worst+poverty
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00016665.bin
814820d96fcfc80dcec25e400d4429ab8ea1c20ae796cdd6b1bc3fe08206f705		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16665 19588 bytes
font_00_sfnt_off00011d43.bin
6fcdbe88bd33f197250729c220144dd66830b7ff303e21e4fa3fdb618cf35428		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D43 19112 bytes
font_01_sfnt_off00014e52.bin
810b31d3bd1a2d015f19ac06b4de776acf2929dd76530c81c1983d73cf0c5dac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E52 10540 bytes
font_03_sfnt_off00018672.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18672 16792 bytes

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