Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd47b4ff7784b62…

MALICIOUS

PDF

85.1 KB Created: 2021-07-07 04:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 34a0ce18866927187f8a4363f5c7ae7d SHA-1: 13d83c2b301ac172babd3e00129047305ad845bb SHA-256: acd47b4ff7784b628c0ab0f358edf34de8283332885c43f614af286080218c09
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/76b448cbc5e2c821b803e1e5a1c5c6e8/bobivenipij.pdf In PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/78456388265.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a19353943f---sirififelipe.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/1lc7v7sta5itgiudv5i8qdck83/jopexitibaruropajiva.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/42fd7da0d97a40818fe0333e1ab1f716/82555646100.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ce908b70dc5c79773a42a650dddd44e3/14131988944.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/c8ee77ce80cba818e5f0d305bbf35a2a/mukolewikepudalemun.pdfIn PDF document text
    • http://poiskvod.ru/images/file/91587548542.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df453e262c---21262398788.pdfIn PDF document text
    • http://garderoba.sk/images/_file/ropedirufekagepuwuzora.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c3c64fcca---mizuju.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160da2101e5f96---mugova.pdfIn PDF document text
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/36810163701.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/f48ebd2a44ac17ea9fca3c15c9f8b2f4/20033673263.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/tijudibikajigusijopazil.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/tojelufogorop.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/pekunijetab.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/resupulokak.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/2846954956.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/dbf5997e583e9061e307ca0c7aad6597/gijiselegulex.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160844df3e7850---gebigi.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/faludafukufakibokar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=latest+video+player+for+windows+7PDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5B 10764 bytes
SHA-256: 3c199422bb014949eb2c2f666a9f580c5df2dc4eb7a19d73b0e539b5f33d33fa
font_01_sfnt_off00010364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10364 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B76 16844 bytes
SHA-256: 58d427bd205ec2b3ca4b885d1f85b86d2b9c3a0c3beb92d80f10bd1fa486bbc1

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