Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab3b66f70e2eb79…

MALICIOUS

PDF

90.7 KB Created: 2021-08-08 12:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cbe26455e99d0e519110296bfdb8dd65 SHA-1: cb5f712b4f8085ed3064686a849eb2698bda290d SHA-256: 0ab3b66f70e2eb79159f3142c79bd8add12a215857d1cae65a57bb723e582b8b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites. These links are likely intended to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161056ba6e89e9---bexolilomapubonagafaj.pdf
    • https://bilegt.mn/userfiles/files/74706805584.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c992c03b0---81922260608.pdf
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/58480994056.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/ea2tovd4v1mvjc298afslraks7/bunigavox.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703f38be47e---55884944065.pdf
    • https://griby.biz/ckfinder/userfiles/files/63697844357.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ba1203a67---25864350328.pdf
    • http://goodwynva.com/clients/d/de/de91e19d235d8a3764238851c6b73f99/File/xudasefenek.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/00f1769eb709c59fc00cc4cec6d4a23d/10372723051.pdf
    • http://annamsaigonlaw.com/upload/files/24312905230.pdf
    • http://dr-onesrl.com/userfiles/files/dusoxinep.pdf
    • https://produktybhp.pl/pliki_user/File/88030356561.pdf
    • http://jar-ted.pl/file/fopujuwewukukage.pdf
    • http://sensi-leszno.pl/userfiles/file/7304401511.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca76f0accd---ritixawagamogila.pdf
    • https://genegurumiraclehealer.comuserfiles/file/56982781507.pdf
    • http://hanifeugur.com/image/files/61487769577.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/39ded52f878afd23cdbe101164ecce50/wowazudazixos.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/bcfd83e5e93fb2618a5424c443bf9ca9/remon.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa44539f12---riliviwesofosi.pdf
    • http://xn--xhq021fvrwdth.com/d/files/35963323540.pdf
    • http://hillandbrownfamily.com/clients/76964/File/24631738975.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/b681cgi96pls67n09dcbif4r42/26667145839.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1a55cd15a---67087204415.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b33e73d8727---96671145813.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aff1fa2c3c2---dapolajoga.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=becoming+rhetorical+nicotra+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_off0000ffeb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEB 16792 bytes
font_01_sfnt_off000117fd.bin
6b8fc716f6b86457a1a3e2c4d250ccfd413e2ef7bd184da4059b5ea4fb2e4cd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x117FD 16732 bytes
font_02_sfnt_off00014375.bin
f82cab0891afd8a38202288d660e07a68a798b4c45079d9c747dc41c496c0be6
pdf-font-stream PDF embedded font (sfnt) at offset 0x14375 10952 bytes