Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f05e0f061380783…

MALICIOUS

PDF

85.9 KB Created: 2021-09-03 22:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9a1a57bf7560b61fb2359e1b16140f1e SHA-1: 675bc9135bc8ebb3e5fee5bdd95eece9cbf0f9e4 SHA-256: 1f05e0f061380783cc1f0431d19f9ab6c7ed384cb47e4c94c9d9067b49f0ce2d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=cantico+delle+creature+testo+italiano+pdf PDF link annotation
    • http://cameranichietsu.com/luutru/files/34799631141.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/7787923054.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8ae24a1d7---mapivexekananojapuxin.pdfIn PDF document text
    • http://bruningfoundation.com/clients/9/99/99acc79c432c4c389b364f5b25189af3/File/rapafig.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/57774536441.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd5b6354d0---tojesu.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/73834399214.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073a35164945---sekowazimonab.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/duwifinenetofop.pdfIn PDF document text
    • http://alltechsro.cz/files/55466253875.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110655c07aef---budezukaxumebiwa.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/24612279011.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/78472046487.pdfIn PDF document text
    • https://jiu-hang.com/upfiles/editor/files/jonuzudasi.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8bab2a731---99644043463.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612afb9ac0205---24140699676.pdfIn PDF document text
    • http://teknis.it/userfiles/files/71975938572.pdfIn PDF document text
    • http://cy2hand.com/userfiles/26013292381.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/felepejesizuwinudo.pdfIn PDF document text
    • http://mirsistem.com/depo/sayfaresim/file/22652888606.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/e3e9e5faa2391c39655ca701f20554e4/vizud.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/giwikefavodonoregorivini.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/ed96f19b90239127dcdcbac2ec906e9e/nivebajefamokumat.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18364141156.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98D 10744 bytes
SHA-256: c388ec2947ca671460ad2867aafb17e43b5e289eb1f121055d6a981a6de6f5fe
font_01_sfnt_off0001026b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7D 18208 bytes
SHA-256: f27755801fdc3892fc7aa3baf921c6256f5b53438b6808673dc76d1c040deab2

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