Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f4e69bf1fc1792…

MALICIOUS

PDF

84.9 KB Created: 2021-06-26 11:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e41c0d235f2438b3800193ecfab6b994 SHA-1: 52c080da36a4ee8b4f2fe20cdf79d91f82a32fb9 SHA-256: b2f4e69bf1fc1792c8ba62bdca02e2acca94b1b4335169e33b85cbe78d44b6e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was identified as malicious by a ClamAV detection and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised CMS upload storage, suggesting an attempt to host or distribute malicious content. The presence of external URIs and a link farm structure points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac14b7a0b26---kurezejapuboribavivenela.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa79c868ce---farijifel.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/cb8e97bd6bc4597ddc705386492474a1/zepovakowosikosunenegak.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b14f47382---felevugakojajajize.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/11bfe889ad23fd9113f59083ed5a55c9/99931117905.pdf
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758d6916989---89057506301.pdf
    • https://abofahed.com/userfiles/file/40342121018.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/rbobf538d9aiu6tblqqpi2ut9a/bofupezuwo.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/7507fa12cc260603c39a6be196153a28/laradenemeletunesoxo.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dba9646c8---96425006693.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf3c550536---63870057547.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607682e66517e---vumimageku.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/34f05991537ef2fd7f94a95953aec2c5/gapevolimebuzejid.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c6453f7a2---90464588542.pdf
    • http://ahkjt.com/upfile/file/92309751993.pdf
    • http://capitaloffice.pl/fotki/file/sonixikudomewopejazelo.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092f22f4254e---78413506033.pdf
    • https://clickkedai.com/userfiles/file/57974558135.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c07d1c35c75---30755051927.pdf
    • http://ajivikafinance.com/userfiles/file/mopijedus.pdf
    • http://cuatro-pr.org/sites/default/files/file/rikoxalopowobinokowir.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082e8b333c4a---papikenutogojunazivunuw.pdf
    • https://pathakpharma.in/singhania/downloads/file/lorujodugupisexifuferad.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16099d761b8ae1---8112505455.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=free+tarot+card+yes+or+no+answers
    • 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
font_00_sfnt_off0000d555.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD555 16792 bytes
font_01_sfnt_off0000ed6c.bin
dac2bb489a830d57fba69d802499c19e5a9d09114283868af7e366cf5a805ea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED6C 10404 bytes
font_02_sfnt_off0001052a.bin
72b6d5534888ecec27fd68dccf88827b5fbc3510db23809d90398b76a33fedee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1052A 16304 bytes
font_03_sfnt_off00011b1a.bin
5d4c3aff1be274eb3342264fc771421483e13e132d0ab65af6f710ce1dcb75b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1A 16828 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.