Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2fda889d30babc…

MALICIOUS

PDF

89.4 KB Created: 2021-08-09 04:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 76a2a4ba4b8a56953a9be8244a4de931 SHA-1: 733ca9467fa79d8b5aaf273db087d4ce8a28263e SHA-256: 5a2fda889d30babc1fb98b30ec23df06825e17b972e9b1f8db2e39a866f394ff
176 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various compromised WordPress sites and potentially malicious IP addresses. The embedded URLs suggest an attempt to distribute further malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16072aa602c99f---sigoxitudojigigopomuk.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/r2pscqno17gj037pr5aqgugpam/mesaxobunizipi.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bd7f59b5b---fiduw.pdf
    • http://sunarfactory.com/userfiles/files/34536737947.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/cda195bd481ecde47b8f88b9ccdf854a/nizepisoti.pdf
    • https://sharenkon.com/files/45386436798.pdf
    • https://dla-pracownika.pl/pliki_user/File/wegewuto.pdf
    • http://popnmusic.fr/userfiles/file/tojegofuvarudutupeditabe.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/sgfakbm6qu3g2im4gfs1n3otei/53230419710.pdf
    • http://hasyo.net/files/file/bipuxaga.pdf
    • https://parokisantolukas.org/Uploads/userfiles/files/74162445132.pdf
    • http://skrabl.pl/www/rpbd/fck/file/gikutotisupilum.pdf
    • http://mlkscholarshipsmilwaukee.org/clients/f/f0/f021f13c5c598389be7e913a1ae626ff/File/wuwebolesomagamimof.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c58bcbf119---10182120564.pdf
    • http://whuntex.ru/userfiles/file/61855766238.pdf
    • http://ulrike-mayer.de/userfiles/files/81177352294.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a0f8be0b7---2422649060.pdf
    • https://cr2tek.com/userfiles/Proj_Name//files/pefirelenolorositeti.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d923d88ee02---wusapenuvegili.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c684ab71ff3---nokegogevom.pdf
    • http://amblamy.ee/upload/file/gosugobariguvubitax.pdf
    • http://hodori247.com/uploads/files/70917365870.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbb7e5a487---74023267488.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df93654bca---fibakob.pdf
    • https://transit-connection.com/userfiles/files/91419991944.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=how+to+do+a+cleansing+with+sage
    • 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_off0000facf.bin
d3ca275771884cc0bd3bf9667becc72cb9aa9570a1e328373320f7d210ee0a4b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFACF 10628 bytes
font_01_sfnt_off000112d6.bin
1208180dca3a6080f055a17fa531d0bddaf4da1e52b292d02e6e79a344640fcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x112D6 17088 bytes
font_02_sfnt_off00013f1e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F1E 16792 bytes