Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08a0574eadcbb4c…

MALICIOUS

PDF

87.4 KB Created: 2021-06-27 19:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0a2cd13aea1acb2b3fc81b07cc0d1de4 SHA-1: 9fd877a15b64b9bbfe62294e57b6dd9f41c49c05 SHA-256: f08a0574eadcbb4c6bbfea1d9b7c3fd20d7d00e44a4bde31473871238ebc4a7b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a remote-support tool lure. It contains numerous links, many pointing to compromised CMS upload directories, designed to trick the user into downloading a payload. The document's structure and embedded links suggest an attempt to facilitate unauthorized access or further compromise by encouraging the installation of remote access software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://philabc.ru/uplcv?utm_term=how+to+instal+xapk+on+android
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16086bd14bb262---felatojolusuzafusuki.pdf
    • http://www.pranabkumar.com/fckimages/file/pefevopizuroxunesu.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071454335094---virebebadazebigamivulasul.pdf
    • http://brnc85.com/clients/878796/File/jekigavuxosegetevadar.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b839e6b650f---jenudujara.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/68807137364.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/junuzison.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881fcb70e25---31800757531.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/8ecf2957eb30ee60639327cc320cea97/11202457468.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/f0073ae389182ba9a3c851e941235e8b/mojirovizerawonejoxaxajum.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a03c53b89---medarigegufija.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078cacc3d6ea---rojevovopofuwoluxuju.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6fe4bb7ae---tupubaxa.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c4603fd7d---27669957580.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16094f29f33612---37702929292.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c7b657c7b---81691206616.pdf
    • https://erdemlerkoleji.com/resimler/files/mudelomokizalebulawafewef.pdf
    • https://angkorphotographyguide.com/userfiles/file/mimefax.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160957e48cc548---rikafap.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/8t917rig7adope5g2u7egf9nss/16575856071.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e4d90af71c93b46b89ab9b3711b31722/sekaxeniwori.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/3inut9hqgs34ugs79d6ivlvufk/memetop.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a53da0495a0---lanupoxowuwizadunumix.pdf
    • 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_off0000f1e9.bin
9d7092450c1e23ad820da4dcb51a920cba64b676e4527504e1a0ffb7c7d119b9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E9 18204 bytes
font_01_sfnt_off0001204f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1204F 16792 bytes
font_02_sfnt_off00013866.bin
b2629d6efe3d65b67c23c8bff231a45025a74c93109ac84d5f74107934eb1943
pdf-font-stream PDF embedded font (sfnt) at offset 0x13866 10524 bytes