Malicious PDF — malware analysis report

Static analysis result for SHA-256 a70696fc592de7e8…

MALICIOUS

PDF

89.4 KB Created: 2021-09-01 09:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9e120742c3b531eacc6bf6a6bd48c0f4 SHA-1: 1301e2343b47c51731ea4e5fa3199088ed88dc78 SHA-256: a70696fc592de7e80e24a4e723dadeb2c641defb3268ce4b62e7121fc6d9e5cd
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 CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious or unwanted content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure for software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://drafthe.ru/uplcv?utm_term=photoshop+2020+download+for+free PDF link annotation
    • http://kbchina.de/upload/migedamovowonolaborini.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/wesukexufurimoreve.pdfIn PDF document text
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/karesofukupegalogije.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/powetuwerikokosedadogap.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/73320707713.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4ba999648---48589530513.pdfIn PDF document text
    • http://riversedgefm.com/files/file/temamitifukuk.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/28987261541.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/vilolizulatopetefaw.pdfIn PDF document text
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/xarowuzevisixasozaz.pdfIn PDF document text
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/60249882845.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/fuxirufu.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608729d3d55ba---memifataguvif.pdfIn PDF document text
    • http://voyagevietnamlaos.com/hinhanh/file/jixoleranoninowiremon.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/27887506336.pdfIn PDF document text
    • http://bdn10.cz/files/file/bapugomidatejat.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/8481182816.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/xogokoretapevosotamub.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/wilexuzapuje.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160786472ae717---sexosekikapovotud.pdfIn PDF document text
    • https://www.gurkhasfinance.com.np/ckfinder/userfiles/files/8990583665.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160926e92ea4dd---79144860285.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/93207228090.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_off0000f6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC8 18420 bytes
SHA-256: 9bab31d1891a6e1173700e027430d905dd7eb65d6858718538004a7861184a7f
font_02_sfnt_off00013ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA2 10832 bytes
SHA-256: ea0036365e8e0a59ee9c5ca993f918a0e6e949a18e4c2a02a176c833d38a51cd

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