Malicious PDF — malware analysis report

Static analysis result for SHA-256 093860e3fb83ef04…

MALICIOUS

PDF

105.8 KB Created: 2021-09-03 09:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f80e97bafe6cb52a1cf4fd73a4666f25 SHA-1: f4a2f01ec71aa508aacbf635a2af5d00c19f0540 SHA-256: 093860e3fb83ef041e54587f48ec4bc308a6a89c88317cdb4bb64b5fb54984ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links likely serve as redirects to phishing pages or malware download sites, aligning with the 'Spearphishing Attachment' technique. No scripts were extracted, but the structure suggests a malicious intent to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/d3f9622a95488d94833268ac2a0b84e8/64415431723.pdf In PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f0d66d635---nobobadifawo.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/mimixojodesuzilag.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/4c64f0feb46537a089193dd5a1123f7c/31466915566.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe4cba663c3---19903549453.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sideso.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160ddf0359c7a1---39195694668.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/zevam.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e34be00a5a---8651671737.pdfIn PDF document text
    • https://vnjhanoi.com/upload/files/ziloje.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/909746a04edccc16584ad4466d1fb6be/zosafajiralovexezizeraso.pdfIn PDF document text
    • http://gialtour.it/themes/userfiles//files/11665527669.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/3446532020.pdfIn PDF document text
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/teturuwedekegidogumojaso.pdfIn PDF document text
    • http://belst.by/upload/file/93502823128.pdfIn PDF document text
    • http://partnercable.hu/files/88893448510.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/salisofesepozunijug.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5ce6d125b---76141553229.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/42323760795.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/gimebufevowukewede.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210621/file/16242520473318.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9c6718228---pasatodesofasageda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=trianthema+portulacastrum+pdfPDF 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_off0001324e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324E 20104 bytes
SHA-256: b0c582289e6537fd160521aa50bf3265b8af92b549fbfb67233bc37e7a549b0c
font_01_sfnt_off000166a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166A6 10948 bytes
SHA-256: 48162e20da80a89b672c1ab717721e4847ebb2b2b1b5f55b03cc091854c355b2
font_02_sfnt_off00017fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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