Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f0fb1976f943dd…

MALICIOUS

PDF

72.7 KB Created: 2021-09-26 22:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9efa5dba8088ff5b618879eb058a6750 SHA-1: 1ce129cd03f1109d92307d8b3ab748ce135738c7 SHA-256: 15f0fb1976f943ddf09f22d69c72b795f076a5dbb4a62e9da962a53c07e10cc7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://huntic.ru/uplcv?utm_term=a+moment+in+time+full+movie+pinoy+hd PDF link annotation
    • http://tonwen.org/userfiles/file/todaguvom.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b50d30ab14---68769289467.pdfIn PDF document text
    • https://keluargamimpi2.com/contents/files/61947345835.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/81667801863.pdfIn PDF document text
    • https://gres-k.cat/userfiles/file/xufit.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612eec6316256---31458220471.pdfIn PDF document text
    • http://businessnavigator.in/ckeditor/uploads/files/58337587313.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/50601066213.pdfIn PDF document text
    • https://grootformaatspandoeken.nl/userfiles/file/suluxoligidukilarekeb.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/rubakuliwefelilavozibofen.pdfIn PDF document text
    • http://copy-office.it/userfiles/file/kavuxotozepinivu.pdfIn PDF document text
    • http://teamtrinity.net/trinitya/file/fejelamunimipekepone.pdfIn PDF document text
    • http://voyagerav.com/v15/Upload/file/2021926126551340.pdfIn PDF document text
    • http://regmac.net/userfiles/files/84267186637.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/bca660spetkp9564bpqsjn3kt4/45674605922.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/zogex.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/ginonowadobe.pdfIn PDF document text
    • https://twinslock.com/locktactyuma/userfiles/file/nemelete.pdfIn PDF document text
    • http://pokrowce-ochronne.pl/Upload/file/ludibatuga.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146a9d1b8c95---fipixu.pdfIn PDF document text
    • http://wildzipper.com/clients/wildzipper/userfiles/file/bumotefaxenubuwusagun.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/9488355101.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/kikado.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_off0000b3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3DB 18640 bytes
SHA-256: 59911d2a22b72b29c9294c09baf5dfc238d0a77d57ed985181470a1ebd11f0fc
font_01_sfnt_off0000e4a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A0 10592 bytes
SHA-256: 5da6d4f03089536b39acc6d0376ffc94754c4e58b1c0c56dda7d6c10c574699f
font_02_sfnt_off0000fc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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