Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29d1eedcb678960…

MALICIOUS

PDF

83.4 KB Created: 2021-07-08 10:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ec22b9a9c56945a36093c6cbaa9d854e SHA-1: d095bbe3a405e79bcec0c05b8280841f6a659e79 SHA-256: b29d1eedcb67896066643bbc8926e51445636e5ee0ade6ec0307192e1715013f
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised or disposable domains, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of external URI heuristics and link farm indicators further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://xn--kprq5pvqklteonubj6c.tw/CKEdit/upload/files/75080569696.pdf
    • https://delaneyllc.com/ckfinder/userfiles/files/wusonezolatolufizusofate.pdf
    • https://facades-et-traditions.com/actualites/file/papojupu.pdf
    • http://1utilaje.ro/mm/file/21958730966.pdf
    • https://unserbiokorb.ch/userfiles/file/vikadakexej.pdf
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/283cbd3f035d4381cb6706a3dbc57932/wazasiv.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b88a6b1afc---42414379974.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093a4774bc73---bobejobipivoxamavida.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/a15cafaec767cee2402ee325124d3610/piluzagazura.pdf
    • http://prvugkh.ru/uploads/files/76644985018.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/7aecre04qhuhitjuthhj7pkli6/fubutajifusifomugefagesew.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ca5fff83a59---78070354049.pdf
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/ec5d7feae91165d8bc34f4481e4809b8/65052203812.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/saanio8dd1ruu97vt1imrsa01n/87770606621.pdf
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e62b261ae6511533903b0c60ab37daed/vapif.pdf
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/norekivonetamifowotu.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/im7mnb3k0lrbk5httb0nhete62/welasefabujujiv.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b804d59039d---76114708399.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609b38d67e74a---93849738207.pdf
    • https://actor-conseil.com/files/file/5448989219.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b01fc4981---70378422841.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/72r38k2sre5kgidh5ijclel9la/pegilavopegivilig.pdf
    • https://rasathantrananotech.com/ckfinder/userfiles/files/tuxiranelolufexekukowelal.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947161e70b2---57811545831.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=discharge+and+dismissal
    • 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_off0000e4bb.bin
32e07c80ea6030eef91de39fe470442cc8fb8dcfd9a5995335e93c11dc6da338
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BB 10600 bytes
font_01_sfnt_off0000fc82.bin
64172e53793067a26721c68144b9119c32929e3d4d507c1b335d25e24cc83895
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC82 16820 bytes
font_02_sfnt_off0001285d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1285D 16792 bytes