Malicious PDF — malware analysis report

Static analysis result for SHA-256 3202d12041a073eb…

MALICIOUS

PDF

87.0 KB Created: 2021-07-06 01:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 149ff52553ee8c02b10a43319c934d46 SHA-1: 5dd0a605ebad4ab18ce574c46968b863959d1f25 SHA-256: 3202d12041a073eba79ac111df706a9bf2d9b1182bfd2827fd83e6466094b50d
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting, designed to lure users into downloading further malicious content. The presence of multiple links on compromised CMS uploads and disposable domains suggests a broad distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://rybczewice.pl/userfiles/file/paxama.pdf In PDF document text
    • http://studioambienteterritorio.it/userfiles/files/62970877757.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c485e3e7093---47011082982.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/85103839343.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16077c7bded9f7---51833513120.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/69445494649.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/letoxilimijizanut.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16091c7bccd076---dutenilolusekumapagebazuk.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/28232871285.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/rejesufob.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/dojafafajimorizowewexivas.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/dd096682bc5e0dea9efc0ab68c8e6bbe/10592076288.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/112304e2246c1b1411b3b784289f80ad/27795783922.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/sgu9hdep2i62aqns250d2fpeou/rodeveruritebol.pdfIn PDF document text
    • http://llux.vn/uploads/files/tesawo.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/jigosuluditomegoxarek.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9e237928c---51851895217.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905bf4084dc---jowarobalimekulaf.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/pexunoduvemisibe.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160817fb59993d---65742782368.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/luzikuk.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c742d26cb---dagamolufakilogati.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=chemistry+booklet+a+levelPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10456 19072 bytes
SHA-256: b5f0b54e864ca24054a8318405213ac9b67680bc1db8a08092ed6bd31d941c2d
font_02_sfnt_off0001362b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1362B 10712 bytes
SHA-256: 0425d40c88a5ea91f9a4622115ee570afd6f1266273707e9a1659d2b113b5073

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