Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ace07a0a086980…

MALICIOUS

PDF

88.4 KB Created: 2021-06-26 03:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ae93c86b790e1b14dc048aa7c587e90d SHA-1: c61695cc23f5eae2174547ebfddc5aac17a5d215 SHA-256: 22ace07a0a086980df31a87e2ca2633260f52c13d0d5d521b3b28216813303f0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, which are likely used to host phishing pages or distribute further malware. The presence of these links suggests an attempt to lure users to malicious destinations.

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://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fbd254158---vojakifuzofosovom.pdf
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/5d09ea4add892b899e1f577e9f3469ae/vavodexulejala.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/0dfe0b0d0615ae8db2de1ef7753e70ad/sigekeboxagin.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097fb3ce4e3b---begezivesage.pdf
    • http://boldogelet.hu/media/20466588509.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/5a7a1dcedd50921bb5c3a8fcfad0e46c/16449071965.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca51108f79---sezigubudakozokinalanuper.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/rbt24e7hnhptubm5aovj575etm/81253722407.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a07cbd55854---xatiresugologokib.pdf
    • http://novussiteyonetimi.com/uploads/file/lepogipukulineluditad.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1f5c3b364---kigofewufonuxez.pdf
    • http://agataklimowska.pl/userfiles/file/1189636117.pdf
    • https://proektasis.gr/admin/spaw2/uploads/files/6698308484.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/3qteesutj2je1aaq9tll8e83pd/64364676991.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/fsni3hcdhnccniuunchlta3m8c/10496657942.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/b8a3103ef4a48bf1aa79f26d91c5c654/76860874299.pdf
    • http://progfin.pl/userfiles/file/libezagujej.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/28sdgbtoqh7agmo72p295jm1r9/buxerumib.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160892782a0026---fijapitajefiti.pdf
    • http://dzbnf.com/upload/file///xamomelul.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/c5f3e702a485dd0bc67706000ca76866/sikuwajowuwu.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a080bdb83---40611655866.pdf
    • http://meble-tk.pl/userfiles/file/logaxe.pdf
    • http://uro-medical.pl/zdjecia/fotki/file/zenuxikekogaran.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16070d55fef806---75038535259.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608db6ace940a---kotobo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=lucha+libre+wrestlers
    • 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_off0000f681.bin
e95bc9f020e1070d2ace0343f7b5ed8cef30d9c670e0b7935524b0da5499439b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF681 17944 bytes
font_01_sfnt_off0001244f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1244F 16792 bytes
font_02_sfnt_off00013c66.bin
eb471976019afb7d6b73bf0dbaf8753f66fe693abe37c274e8c0cd28327476c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C66 10384 bytes