Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea69e0e4f49f89aa…

MALICIOUS

PDF

95.9 KB Created: 2021-09-01 07:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8c709e665dc32e9a4c7afaf94f557591 SHA-1: b326ae226403c671f0ba6794e1b91ef069c28f09 SHA-256: ea69e0e4f49f89aa856a7bce371327d4b829d1ae40c8f6e6841772496f4dac76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's designed to lead users to malicious content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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.
  • 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://crysiq.ru/uplcv?utm_term=pokemon+mega+fire+red+free+download+gba PDF link annotation
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/6edd62043d6903989399ecd0c45695c5/fosulevivupapigewif.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/a2a851661ed88896cd17419e35fd7221/tisatotuvupuparisuwufipo.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/d53f286440e0942b9115d4c561282b4c/82470422945.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c474ae85a---vixemolu.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777f212ba2f---12891201883.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16082c152eafec---47390546087.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16080434fe56e4---joforeragu.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7bdb92287---tubigikozijaraguduvoxorar.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/52542252009.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e90eec18a98---mubix.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084478cd2823---82741732558.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/firixowuvifixobotenogepi.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/11320968215.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/0471414431cb26e3d98f13f016e71687/52481781529.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/19276072894.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/96809131071.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bce4cff91---molusalejewobe.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/tasezomelasuvijizutazoj.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9274bb152---23399953855.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/de83e2099d4fa84f18d633d028d33ad4/92318833725.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/gewuxusize.pdfIn PDF document text
    • http://normel.org/files/upload/file/fakupubizobufuz.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/j0g49bs1r89jmfb58nhhke6i04/26616997411.pdfIn PDF document text
    • http://prosquash.by/data/44244960405.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1e256a3d3---23450958770.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC1 19360 bytes
SHA-256: e6b9986cbec68de716f83960afd897a6b406ff2300dd0c8cdc238924f7f75b0c
font_01_sfnt_off00013f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001574f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1574F 10748 bytes
SHA-256: 409834959d0fd967f037a58cac934c31d6fd707db4bd62736a3a42b35c61e525