Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f9f063292c1595d…

MALICIOUS

PDF

87.3 KB Created: 2021-06-30 18:41:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5fc6ebe7a163e86d95d1b7916afaecb SHA-1: 7d32e51a71d9dcc9b330bd9b00828e56afa860fe SHA-256: 8f9f063292c1595d314470a3db9da351235a0df83fb134816c54e512ca24acca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting it functions as a link farm. This pattern is commonly used to redirect users to phishing pages or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://thebeautyofdesign.nl/ckfinder/userfiles/files/34463494326.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d953f379eb7---monose.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607215c1c9791---ralara.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d831f061b42---56269361034.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/91d800463f841e32a9c50d57bb4e7e94/vororazojabelurat.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076bded6ca85---fixavizanojesakipale.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/65e76718eb67cf6a45da88ae39972ff5/59821446010.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bb8ae4bf86f---fifadigutuminoverekisu.pdf
    • http://dansensvenner.dk/imagesfile///wosub.pdf
    • http://nessium.net/userfiles/file/kenuwemekisup.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/52292c48d96e7b9f00a963f83919a8a7/nanunolupexazamez.pdf
    • https://lee-trading.tw/archive/upload/files/xuduvolelobezapogonewem.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c983fab724b---94493393242.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/6f59505b9ec38603298359525fe6d51f/merazasugafeguwoxeju.pdf
    • http://ztkammer.at/uploads/file/16865251408.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4c5dce437---fogosuravuj.pdf
    • http://kompletucetnictvi.cz/files/file/40224694628.pdf
    • https://alakharia.com/public_html/userfiles/file/33298451229.pdf
    • http://ogbchurch.com/clients/880797/File/sebakobefafigozozutofufi.pdf
    • http://indianaquesters.org/clients/9/95/9573c8d6e108c9729a37356986dd5b5e/File/voziv.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/1c533f8c2797ae0cb0bc7f7d07f90279/jejasexinepulusililazaxe.pdf
    • https://infrastone.com/userfiles/files/xiruxukuvuzefeneri.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/4b6fb4bb115342602d37cdacb2d43098/sobemelidabefabenifod.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c1de965e4df---ziwibemo.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/cjifearfg2kv3cn18a6a4ncmcq/bebezowavaxumidema.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7d1e1dcf1---judetise.pdf
    • https://akita-inu.lv/www/files/files/duferuvotulov.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=different+types+of+hooks+for+essays
    • 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_off0000f3a7.bin
b2fb17c07f4e922f9b8cf7b919f0b01a3bbae8f12238d21df200f719951c2ac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A7 10616 bytes
font_01_sfnt_off00010bf3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF3 16792 bytes
font_02_sfnt_off00012405.bin
afb73733cc15b1ef08c04be138aabcbfad2e3b2b833bc1386beafacfec999eb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12405 16868 bytes

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