Malicious PDF — malware analysis report

Static analysis result for SHA-256 07fe4ccb8b0feef8…

MALICIOUS

PDF

86.6 KB Created: 2021-06-28 23:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5c7293edb63cd3a2c4247bc7f99d63ae SHA-1: 0c6d55c448db3b804e70bb7831819d9c03e04c84 SHA-256: 07fe4ccb8b0feef806eef487556c01c39d8de7129c84f64198192eb1dd30514f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. ClamAV detection further confirms its malicious nature, classifying it as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=osrs+cooking+gloves
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/5c600a0243cc1773057fb90e1a5cadd0/14056819918.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ed93bc23f---52144879573.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/tpq6m3qdk952tacro98je5km82/14380471157.pdf
    • https://kildevangen.dk/files/mizeximelupopubopaviz.pdf
    • http://gptools.net/userfiles/file/faturaxapuramofumumilu.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/5hdh3ctib844697mo5j3v16qgu/fevitegegusefenutitet.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/fbad261e06e351aae7b1987b52e7e116/zagakixitelevini.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7dc60d8b7a08ace95b9c0a5c523d8b7e/57580004568.pdf
    • http://ankurgroups.com/userfiles/file/55430200762.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/253c3ebda5236d65367341483d6d0d5a/fepudajeki.pdf
    • http://robalton.es/Albums/images/file///95339723355.pdf
    • https://mujeresenmovimientoplus.com/userfiles/file/91587951761.pdf
    • http://allycatering.com/userfiles/ratukujepap.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/163f1f5eca535ec8ebd5376bab049e33/minugewumopelufud.pdf
    • https://moveo-sport.pl/userfiles/file/batomulefozu.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aca1a61a537---taselozikakezopakajego.pdf
    • https://burstallconrad.com/editor_files/file/jasozobipoxekupilekapamo.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe433e6220---89959712737.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/q7iodlhc6g97doib876p06cq13/lujukizigudenaloguxilo.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a976870ef---50305156525.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608bca05b2e87---9314160694.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa8c1d7d50---10448306631.pdf
    • https://mmszke.hu/files/file/99899046070.pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/316c1d3f94f2fabb048c61fec51f7ce2/wozuralewutabokagoxafeg.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee83.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE83 16792 bytes
font_01_sfnt_off00010695.bin
0501382cb918de8b0d43510ef2381a808d5c7e411a5d8d23565b43746edcbdc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10695 18056 bytes
font_02_sfnt_off0001362e.bin
1982398e0734fb91b9aa7fccba41e0f8e7b907ebf8eb88917fb12fe6c27bfd96
pdf-font-stream PDF embedded font (sfnt) at offset 0x1362E 10328 bytes