Malicious PDF — malware analysis report

Static analysis result for SHA-256 e267edcdfc291b01…

MALICIOUS

PDF

76.5 KB Created: 2021-06-27 21:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1d51d4483b2120678021f64df788ff25 SHA-1: f9cab3c0364bd80e7dacf12683a4c437089e5a50 SHA-256: e267edcdfc291b0196f7fbd5a9be5aa8d1e8190cf2f03311adb18443ed2f2c65
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The presence of embedded JavaScript and multiple links pointing to compromised WordPress upload directories strongly indicates malicious intent, likely for phishing or distributing further malware. The ClamAV detection and ML classifier further support this assessment. The document appears to be a link farm designed to redirect users to malicious content hosted on compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/702352f8d061b190d47d26cf494c1cfe/11975652168.pdf
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/nti44nb3j06b5pde96o37if4pe/mofuwamotisatukabiko.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/tl7i45inaq4vkieihgd1ecjtg4/xelitumesofomokajilapafo.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/er1mu16l46mjhs3gu0c3f12r81/18318580905.pdf
    • http://tradeweb.es/userfiles/file/31701446630.pdf
    • http://chalappuram.com/userfiles/file/pezogume.pdf
    • http://paintmaster.hu/js/ckfinder/userfiles/files/15466379531.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7454723e---jogozazid.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/d91d9e99f2b9201aeef310a9d6c3b7f8/daxobaxoxukururari.pdf
    • http://suacuacuonthanhhoa.com/upload/files/6962554447.pdf
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/38316801708.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/4699f85af2b952679e3231ade95197af/nunijerasulogekor.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/a407434332bc255fc3a2f76491d00ba4/merafateti.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/ndb1di6lhmi13sqeak00br7jq1/zupewobopal.pdf
    • https://alutat.com/data/file/12114323619.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8adec47db---roxerugovizudolebeke.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/2e6eca98e0f03a74ee1fa4ed741c14d9/32190446232.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc5bbe1589---91430340440.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ac44749f41b---12855404518.pdf
    • http://project-lovcen.me/userfiles/file/37798813856.pdf
    • http://crescentcarpets.com/userfiles/file/getaxuwowap.pdf
    • http://baovevietnam-vnss.com/upload/file/39066583952.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+many+cubic+feet+in+4+cubic+yards
    • 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_off0000c912.bin
658f1fe81a7b4245de977f6a32c0afc2926824bd3bf9d08a062c57ba59b0f887
pdf-font-stream PDF embedded font (sfnt) at offset 0xC912 16072 bytes
font_01_sfnt_off0000f29d.bin
772e6d96f900714a80c3006470721ee844327b397844c4483d9016e2e53e43da
pdf-font-stream PDF embedded font (sfnt) at offset 0xF29D 11100 bytes
font_02_sfnt_off00010c9b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9B 16792 bytes