Malicious PDF — malware analysis report

Static analysis result for SHA-256 975e1def621f275c…

MALICIOUS

PDF

93.0 KB Created: 2021-06-28 19:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af086543dafbf12dc03e17d3a2a8bbb1 SHA-1: d00c11fb04d95f811024d0952d44e37528676bc3 SHA-256: 975e1def621f275cabaa4f2ec0e7ef114823458bcf5c450b9d1b7dca2415afa1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload directories. These links are likely intended to redirect users to phishing pages or download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://allytemp.ru/uplcv?utm_term=most+organic+water+pollution
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/nt7hj31n9koqak6h8japa6g0ba/zokitel.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c958b82c969---fanepigutiviletudimizar.pdf
    • https://memoservicesrl.it/file/kupotupisovutunisu.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/1thembo75nr25sph64ohch0t5u/4062342673.pdf
    • http://dienvietbac.com/uploads/files/wagujasibeto.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/55c0n15c4332ko4eev3lcq143q/71284304093.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a99071a1a3---gojofonexexonu.pdf
    • https://mangonebike.com/uploads/file/muzekamamuvurerap.pdf
    • http://ferramentabelleggia.it/public/file/nofebubidobafasaxe.pdf
    • https://agencement-menuiserie-var.fr/stockages/files/sawebova.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765d5142aa1---towukefetuxefabot.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/f9828793d788496918acf9010c0ac5f1/bodazekonovelevoxotu.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb322b48ef---93739977049.pdf
    • https://elminhaj.org/userfiles/file/32282379348.pdf
    • http://dspec-car.com/js/upload/files/kasilegewuxenifopuri.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/2a1939614cb4d60545c775fa8ee32f64/sojadawefefapat.pdf
    • https://guineaservicesproviders.com/gsp/files/99470662979.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c516e6a16e---tojimowisutaxedefabakabob.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a231de3012d---bivakowuje.pdf
    • https://muzeumkonstancina.pl/attachments/file/gukavuzu.pdf
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/88273355237.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/8b0f49861d1ed373d29a9b3686eb4a68/ronapezurolunesotadabibeb.pdf
    • https://medlineplus.gov/waterpollution.html
    • 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_off00010a58.bin
c47d0f7aca19a02e680239e9ecc83161adeb0080afa3815661e5b58805c8d17e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A58 10728 bytes
font_01_sfnt_off00012339.bin
b45e6e0b76dab8dd665eca6b230b8522afa4a7a9e4a163e1c63ebb3d2769bb0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12339 17092 bytes
font_02_sfnt_off00014efc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14EFC 16792 bytes