Malicious PDF — malware analysis report

Static analysis result for SHA-256 e84362f42877516f…

MALICIOUS

PDF

89.0 KB Created: 2021-06-25 17:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 703cec9a140eb59cf1d3f02803328af0 SHA-1: 42f2af79a9abefb1543283b7d0219d00bd77b05f SHA-256: e84362f42877516f2b122bd7da310dc6a9728ed8d0ea636ccef2b20ae46086d8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to compromised websites, likely serving as a lure for users to download a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and link farm heuristics suggest it's designed to facilitate a phishing or malware delivery attempt, potentially involving a password-protected archive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4756b5271---mefarekobeguzuzo.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160abbe9b14a15---76756636564.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/39c5154377e46c6a9341686c2347c7ea/zibivivojug.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c340c24eb08---dukarepigobopaguw.pdf
    • http://sacoorhealth.pt/site/upload/file/woxumagogajagaliduvupi.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/83ed70cde9f255771010f60517edea19/35778465332.pdf
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/dilugofelereduta.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160c63c82bc238---7926611386.pdf
    • http://promocode.lu/userfiles/files/zuzaliwimafodosiwe.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bb779c9aa97---80638989186.pdf
    • http://campcolefamilyreunion.com/clients/82065/File/kuvademelosu.pdf
    • http://dalboncostruzioni.it/userfiles/files/65072143950.pdf
    • http://alexlunacoach.com/img/editor/file/27862726872.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/355130fa0b76c539f4d73e3de0c2b5ae/9875986884.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/cf350c27fa506602ffa57b17aeafca74/58390462298.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609a86fe531b2---sogenoj.pdf
    • http://doks-films.com/pcms/content/file/54704438157.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b30be6dbb3---15249300513.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e0af6ce8d---wuremujobatiwanamuvabi.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8aaeb38944---25858662948.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5f07e2ac1---gaveridajogojusokebovo.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24b2a1c804---79172223071.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160757d8b0cbb0---welumo.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd7e18ab39---xebifuvir.pdf
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/3a4a1371a49d5fa6ac1bc110ae05ef5a/31995008616.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/23256834931.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=wifi+hacker+rooted+android
    • 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_off0000f657.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF657 16792 bytes
font_01_sfnt_off00010e6e.bin
f96c4e65e4cbb5eed231fd98d92dfe814716be14d878f276bc19b687f3684454
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6E 10444 bytes
font_02_sfnt_off00012619.bin
95271e07e0cb6dc98926f7727f0506e9b8a8d056f96f1badb7bd962c86c0b3bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x12619 18212 bytes