Malicious PDF — malware analysis report

Static analysis result for SHA-256 0420ab420d8a5e73…

MALICIOUS

PDF

99.1 KB Created: 2021-07-16 12:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 36f07821ef78baeb89f9506a0ecce474 SHA-1: 91af0daec33c4bdb7f3126877d954b404f8b0c8f SHA-256: 0420ab420d8a5e73e35af9e336fa6c20f786c844ec2134d03b51ddfd7347dfae
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 websites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely used to redirect the user to one of the listed malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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://infrive.ru/uplcv?utm_term=electrostatic+force+definition+physics
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/176975616e8949f19bf37ee7a8b279b5/8558253260.pdf
    • http://fairmonteast1969.com/clients/876766/File/28379906734.pdf
    • https://binarbaid.com/public_html/userfiles/file/48069429080.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/1963f3bb002eecfe631f256333f8fc22/jutoful.pdf
    • https://newchat.xyz/js/ckfinder/userfiles/files/357248881.pdf
    • https://saam.vn/images/content/file/xenolusobakuzazunazum.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7661b11e3---janedewunobezojeje.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ad1b01a0---27508837693.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6010d2a26---tedafozivomelonas.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/8fef4498159b84cf16383032ea790b50/luramusudod.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ig2mgol60f191s5lr3hl7lon86/52825932490.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/29d23f04cb9b003fad1813b9a50393ec/gofabinugexasunurejowulud.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/4e5effb0db737037c8c456a5733c3e1d/39231265671.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/9efrhrgl1o729v2ra32sms7ar8/99752556030.pdf
    • http://jkphotocon.org/data/userfiles/files/pigutitameditozusatu.pdf
    • http://aarogyamedico.com/userfiles/file/35709012640.pdf
    • http://dynamicyunnan.com/ckfinder/userfiles/files/kevimoderojudidiworop.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/sprksboodndfrt7gklgrb3git6/98898009941.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b53e8f4c6---jakesofutanelusinoj.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/c27cc89899a4e55751a47802d4e96f4f/82976001079.pdf
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/581227b72cfd584f2f7211fdfed908b7/gejazodefokamaju.pdf
    • https://angkorphotographyguide.com/userfiles/file/todakodokedudipoduxub.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee1b38dbb0---9475185763.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/39c74ad8b558d64490ba9e233692cbe1/gizakipafi.pdf
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3f8f3042d---tegiwizetuxelakeduzewut.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010370.bin
0de48d09b0091e2dcca1524f119562a2650f4f0070c1ddb91a42211a810a88bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10370 16160 bytes
font_01_sfnt_off000118fd.bin
0bfffb7ab18c9f022bbeae3ec9f9d0e40a9e56709a4d013a9b241200bec51ebe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118FD 10816 bytes
font_02_sfnt_off000131da.bin
a8d164be04fe157770aad6de170ecff832f0dc9984a5b7ad3c7f95cd90dfdd4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131DA 19640 bytes
font_03_sfnt_off00016685.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16685 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.