Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee0f45ff99077cc…

MALICIOUS

PDF

92.4 KB Created: 2021-07-07 04:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 762ef5c0cc770900425c860ede959b58 SHA-1: ff32a531754744490f313319613f9d32edea46f8 SHA-256: fee0f45ff99077cc2eec155c1d94775b97db26d6a69153659a5732c6b725eb5c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites and disposable hosting. These link farms are characteristic of phishing or malware distribution campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://vksraja.in/fckeditor/upload/file/27051118952.pdf
    • https://betenagro.com/sites/default/files/file/41420542300.pdf
    • https://gilbertems.com/videos/file/88165807635.pdf
    • http://anatolianlgs.com/userfiles/file/71232812913.pdf
    • https://obermeyer-modemarkt.de/upload/file/debitajaraxotawa.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/dec0951325f9482513160a26d46005e3/lijukoxuduvutaxasafap.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/808ae8e076a1e804cf83d17e10a2d151/3545683317.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/9b1833a8dc70e3a0e71029aee0a82a33/12146876569.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/58e17f6b2b0c47fdf0e510a8838e45d6/74489294069.pdf
    • https://habibitoursegypt.com/ckfinder/userfiles/files/62068020027.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/794af719ab9f1390a5e2f77c8746d99d/tumiwizititesosef.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/6e97b148aefe13b694b6818f6786671f/16893462658.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc2cf7164c1---givubakopixupegos.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/8d8fa0539a06cc3dbae02163ec5dee42/refeniduxizijelam.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9e2bcefdd---35840617772.pdf
    • http://japan-railpass.info/images/blog//file/92375606206.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/198d76ff3b559e6f8969886cc7eb3d6c/75549157535.pdf
    • http://www.pattyn360.com/upload/forum/files/vajilikokimuwizo.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/fa8afd88ab43c50de590f646b6942a3e/19416247068.pdf
    • https://bleikss.com/userfiles/file/70990736468.pdf
    • http://kingsauto-bar.com/js/upload/files/63854736891.pdf
    • https://dursunguney.com/userfiles/files/lusoka.pdf
    • http://whs1979.net/clients/65916/File/fekala.pdf
    • http://allycatering.com/userfiles/bufifebazeburupafekotof.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d5027b12b29---lunume.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=questions+on+rolle%27s+theorem
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb69.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB69 16792 bytes
font_01_sfnt_off00010380.bin
13657f8bfe6277f3189275cbef224be04506f713f6f30098b9148b23140a3d56
pdf-font-stream PDF embedded font (sfnt) at offset 0x10380 10404 bytes
font_02_sfnt_off00011afb.bin
5db0e20126bad8128d627ad93f3bcd2251a0ea9554fd83ab6912e8d54796dcd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFB 19060 bytes
font_03_sfnt_off00014e16.bin
e9a9437d2a5bc98a018dead7395b2c09ad1f4328b89996955b0e1db95507573a
pdf-font-stream PDF embedded font (sfnt) at offset 0x14E16 16120 bytes