Malicious PDF — malware analysis report

Static analysis result for SHA-256 038d02151747dccf…

MALICIOUS

PDF

86.6 KB Created: 2021-08-25 08:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: de1f590a1b7b0f72558ef0375b6a89c8 SHA-1: 83b6f8c9fe849a36654ad08c7c49e0f89953d592 SHA-256: 038d02151747dccf0129ffedfd7b41c8f2bf0f6cc2a5be0f54dc9906044b1f5a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the nature of the URLs and the PDF structure points towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://queure.ru/uplcv?utm_term=law+of+attraction+in+psychology PDF link annotation
    • http://orthocarecentroortopedico.it/userfiles/files/posikowasevuvix.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/5335ee6cea87807ce33708fd3fdf7432/82297423471.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/32977783086.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/16030729817.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6eab5e504---31728535762.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/koxur.pdfIn PDF document text
    • http://gpshardorawal.com/hemkunt/userfiles/file/38175396447.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/rexerobo.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/1nlah22k7oidijnch7jgaso032/loxuforifoluwijederilog.pdfIn PDF document text
    • https://ristovski.mk/public_html/upload/userfiles/file/gasepi.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/45774360938.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943657c1121---samijotiwuvubago.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609695e4d634a---kiwuwaligivajek.pdfIn PDF document text
    • http://rayer.cn/d/files/dutekanikil.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/xogeruzepekunoneri.pdfIn PDF document text
    • http://glastergroup.ru/userfiles/file/notefidefupigenurezij.pdfIn PDF document text
    • https://akemi.ro/hirek/file/foxudemiz.pdfIn PDF document text
    • http://w-mill.jp/images/file/dekojobumekalutuxabote.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/wilipuvexiruxif.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16087a1d2e5771---mubuwexogutatogetoso.pdfIn PDF document text
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/wokovugelitapotofo.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607595150082a---69835159347.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/stb7qqqq3rrqebiigm81g26bju/vopekixez.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac3a62289b---lesametujave.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acfd513e5e4---890551118.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_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10492 18020 bytes
SHA-256: d025c16e109d1862982a1dd3efec3698c2665d3479239774066cd96ec83b691e
font_02_sfnt_off0001340e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1340E 10784 bytes
SHA-256: 8cd44b5b0611a5cf864affd157eac505b5e140b739b5ca0b259dc0f439520e44

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