Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9be4a590de90819…

MALICIOUS

PDF

88.6 KB Created: 2021-06-30 04:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 487957d279625fd08c35e7226190422e SHA-1: e0bc438e32bba41c110a6cabfdfc571e4bf59d84 SHA-256: f9be4a590de90819ef2e9daf9dc3d3e2a2d90bee55c673b455519411274dcb5b
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 document functions as a link farm, directing users to numerous distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting. The presence of embedded URLs and the overall structure suggest an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718c011b675---76971191394.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd069366914---jojuvefobomupefasimowumu.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/1jr6v42dcvp0qb3q0q42f46dso/lojodojunazafajevebadowog.pdf
    • http://pathtojanna.com/userfiles/files/9085934790.pdf
    • http://www.findvoters.com/userfiles/file/porelalalimukavuwame.pdf
    • http://zwickerfoto.hu/_user/file/mopokupon.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5eed578ee---78872650427.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/26e840479901125009c992612f70d502/42129415732.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/2b479e9986c49c5f23570258858b6aa0/bulobimeviralefajuvafid.pdf
    • https://cplastik.cz/data/cms/file/kitufotijujajuxilibemene.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3768f2d2eb---23153377410.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c91beb697ba---16268881106.pdf
    • https://apsco.ly/userfiles/files/fexetalu.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a354508cd42---subapumopak.pdf
    • https://jetaime-shop.com/files/nedala.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160935ef79f587---98550085479.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/c2a0421a7fd0c1570a02ade0b7c22c0f/82664939.pdf
    • https://epiphanych.com/images/file/falivuwekevuxun.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a87a13ca39---tidop.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/a2a4fc4a132342a04bfe80c0d741740c/44515938451.pdf
    • http://brkvinc.com/userfiles/file/mezevodimugowoleg.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/c2mcv1fu5f8ih4lbvl4dhvs1cf/rumapozafole.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bed548c98---kapejor.pdf
    • http://przychodnia-felinskiego.pl/uploads/editor/file/tunapunofofalota.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/0hngk8t3k5dq45cabjl2j9lm0f/wepovajitakoxobokida.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=hard+bible+trivia+questions+and+answers
    • 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_off0000f6c8.bin
b23b74dd94e01fc9708bf852969bc7188e5c018688b4ef56681f56c427c47149
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C8 10772 bytes
font_01_sfnt_off00010f76.bin
dfa837691d86a1ccba91ac4716b08ade4567abc5cb5648148bb348febce09d6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F76 17424 bytes
font_02_sfnt_off00013cb9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB9 16792 bytes