Malicious PDF — malware analysis report

Static analysis result for SHA-256 343076fb2a68568e…

MALICIOUS

PDF

77.7 KB Created: 2021-07-06 12:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 293bad51e68da046b0dea5c0dec9eede SHA-1: 085d179e1f6fd54ad2a41c34d1e9564924266cf1 SHA-256: 343076fb2a68568e941e5fbd1ec326f10727114e8603fa358b33c29aa1620c8f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress installations, suggesting a phishing or credential harvesting campaign. The document body is unreadable, but the heuristic firings strongly indicate the file's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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 https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/6727c29c79375b069f6f773bf83a2561/kojuzirunefevemowizanemum.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b02079beaa6---66217119265.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607183b5ddc72---bibizijamitigotajatilotu.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/460851da5c798ddb60dda03185e3f260/17596470735.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/afc65cd619ae0eba974ad8e781a89653/xunolavorevexi.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160964e1b8c2e8---suverisejaxitifopovo.pdf
    • http://csc020.com/userfiles/file/20210702030306_036psn.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a497122fb24---47321910772.pdf
    • http://leakefamilyreunion.com/clients/63964/File/pitivurixazinirezaxe.pdf
    • http://grafiport.com/userfiles/file/nibuzuwo.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607e61c4444e0---zufozatet.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/5b0715b3d3083c485fcbfcbb1c751edf/fudupalejiwuxifetegusap.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b48704e780---63810284528.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a13110a7f5---14457688657.pdf
    • https://chuyennhakienvangvn.net/upload/files/78547507553.pdf
    • http://ezibra.pl/upload//file/54462512789.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/ilfmmie7urkiqav658p598ek34/vaxoteli.pdf
    • https://cargobull.cz/res/file/xewemokip.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609eeb06b860c---xelepewemijowifexedurogom.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/3b7b49ad8f3f7a9d223637e870c738d7/56162621171.pdf
    • https://acryl-bg.com/userfiles/file/fuxomerivovibajerebaki.pdf
    • http://bukharasuwanee.com/sites/default/files/file/31056177519.pdf
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/633f4d396059b391409feff7a5d74089/posaburebimesab.pdf
    • http://sportnazona.bg/f/uploads/files/31797362072.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/4f0b7fa72e242fc725416f8c08572a8c/sixepilezulalugupixuvag.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=corn+and+carrot+salad
    • 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_off0000cd60.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD60 16792 bytes
font_01_sfnt_off0000e577.bin
2a9420e0c468e5afee0f9e555f44b3086d0b8ba56831266629684d8efc2596c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE577 10172 bytes
font_02_sfnt_off0000fc5d.bin
3116f3462da218613401360384110ab0fb06cc2da7b3bed90e6dada630197e98
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5D 17032 bytes