Malicious PDF — malware analysis report

Static analysis result for SHA-256 022d6226a9c11089…

MALICIOUS

PDF

115.5 KB Created: 2021-09-04 00:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3a0a790f115ea17e010586a268d6562d SHA-1: 6d1d1d09a36e01a824deda6718c434330e022a22 SHA-256: 022d6226a9c11089707979cfe3e55db45d65f2804d5d36da9621828a847d1615
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised WordPress upload directories. This suggests the document is designed to exploit vulnerabilities or trick users into visiting malicious sites, likely for phishing or to download further malware. The ClamAV detection as Pdf.Phishing.Trojan further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://crewmak.ru/uplcv?utm_term=troy+bilt+weed+eater+manual+2+cycle PDF link annotation
    • http://kastely-vacduka.hu/fileok/file/10176006178.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/ebbc6e0e3eb034f64eabe09b74bc5f1b/kobajubu.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/368d250b04664fea7a011e8b0847f3e8/losolupovavitojasarudabo.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c1e16a127---92568168958.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/xovegolufobewigakijatola.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/a22c4c0fcf41dce64bf150ade8e1fc52/71027953544.pdfIn PDF document text
    • http://vigova.com/Images_upload/files/melub.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/94071721931.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/gadilojejanusof.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/34586665683.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810622528e5---60003212051.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160863e73ac02b---38611189284.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/ce2ie6kpgsvkmtnneo0ui46e6o/38532159452.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/10431256388.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/g34tsockeqjq4036rfatba2kg1/66511042833.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f8cdba197---67505291387.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f9aaa34ff1---kodadif.pdfIn PDF document text
    • http://rosswellbulldogs.com/clients/b/be/bee1e50a814ad4ba40998340b8964064/File/takotaj.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/a1e73cdb0f4eb80284cdd214ef87dd83/81640912234.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bac5b0e131---53363659384.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849648ca0e0---57352909040.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/taporuweges.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/a6dd1820e6641353e36c6f7e40809c6b/50673635729.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/dgbhnbgojr3rqumkcne2adibau/xegelefogubafujoxegi.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100c40585eec---jojesime.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_off00016261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16261 17064 bytes
SHA-256: 0ec4a950d1b485d8afb36fc983884dc5dcb00a11ebad6751218b59862c3d0203
font_01_sfnt_off00018eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18EEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A702 10884 bytes
SHA-256: d24173b2d3df7ee253eae6f2f2be373520257f723c2ff656d6e3bc4f939ced81