Malicious PDF — malware analysis report

Static analysis result for SHA-256 01235c969ee3049f…

MALICIOUS

PDF

91.8 KB Created: 2021-06-30 12:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61940a15949f877bc95d43b300217f75 SHA-1: 572613df09aa3fc6a3c1194590b6f8255d3bef26 SHA-256: 01235c969ee3049fa3b656ddc779cbb732e08122222397287916b6460afb0113
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160afbb0c21ea1---50585318181.pdf
    • https://viticoltura-enologia.com/file/84866864799.pdf
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/8c4d0fb1c0728c693a2f131357d2838d/jobamiwolaz.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/00ce0bce789ae905fdfdb58a80feb1c3/9710752667.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/27563r7en07ggncjf04hha4vq5/57820911222.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16086a62346ba3---zokegizasavusopusat.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/pdh6u5f2if99tj8p9kgfqjr2u0/gowelekupunimet.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f14a896077---87275841426.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078046bb9f07---25386187964.pdf
    • https://eminencesolutions.in/resources/userfiles/file/rekitobavosizuxuji.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f17bcc786b---rakexarumavumodusabe.pdf
    • http://fanti-fitness.pl/uploads/assets/file/rogemaninon.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c06934f38ca---redezosilidezazisuwogod.pdf
    • http://aire-limpio.com/img/editor/file/60482131688.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/olot4qp3kslite5i7i5fjnplq5/15094413415.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/d91497892124eaf55547bf6a46df5f10/22979807576.pdf
    • http://etasystem.net/userfiles/files/lowofajozizunixebubazus.pdf
    • https://cakenepal.com/userfiles/file/legedetixodoponotikoxanof.pdf
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/44bbd1e8d7796f442fdf85e566a1f96d/48411411810.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/0ec5cf31428d6a75b6875c730b434f1d/6626847203.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/815e36b5daa596e836c4c380b3807dd7/vurexowapemi.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609468ce17870---fexamizirisirireron.pdf
    • https://juhaszautovill.hu/userfiles/file/powaxebuvase.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/336976e0d2fb6a5864c5cd0a637ce87c/bijopademixuwaxa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=chapter+27+section+2+imperialism+case+study+nigeria
    • 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_off0001013e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1013E 16792 bytes
font_01_sfnt_off00011955.bin
9e2d655f4df9d3725a6c1f94ce1c567354f2aea6760cee9d10cf863693b99789
pdf-font-stream PDF embedded font (sfnt) at offset 0x11955 11376 bytes
font_02_sfnt_off000133e7.bin
16912c8cd8fb827ac8187216e775c97b3642d986b028d7dc7e5bb9aaf7fedbec
pdf-font-stream PDF embedded font (sfnt) at offset 0x133E7 17368 bytes