Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd0db660456f045…

MALICIOUS

PDF

84.7 KB Created: 2021-06-29 06:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 87c31c2a55b88a1e98ad91cb8425fedd SHA-1: d82540d9f174ad78775d95c34b4bead08aaa1a2c SHA-256: 2bd0db660456f045e3d1e153c4aae417c09780c711edc79aa585c93b458b8349
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

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://radmangroup-ye.com/rgfiles/file/kifomelawovetepa.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739d06906b6---99278210585.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/d5s0uhdb2mdv9f9shlnnldhknt/19024982552.pdf
    • http://andlupa.com/userfiles/file/lodutujokop.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b0317cc63---wedusudos.pdf
    • http://makesomenoise.hu/upload/file/fazifafufofolabeno.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a919b799345---bogumefepudavukozujavodof.pdf
    • http://adria-ex.com/images/blog//file/tuxelufolixalabufuvir.pdf
    • http://chrislahoda.ca/userfiles/file/tukadare.pdf
    • http://blbr365.com/userfiles/file/1623409271.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5bd47afe2---81007403241.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f642baffa---25401776630.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/81bbee701baeab7e245beba99e4f786a/53180054711.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/t6bmeckgk1ovumei2669iu2c94/13992580386.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b52dfd5d5fe---30478784063.pdf
    • http://ipsgroupjjn.org/userfiles/file/luluwumuninolupefokevu.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/fd0qrs6d87g1dc6m2l6sfekv6q/82409204651.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160943c9fbbd85---52927099914.pdf
    • http://uforoi.com/app/webroot/uploads/files/birodemerora.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/11c890ab03c8cd2c7866983844e04cfa/vomifel.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/ac288bac29c8dcebbd5aa334b449975f/wafajegol.pdf
    • http://rld-carbon.ru/file/21823035483.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=emote+at+stone+statues
    • 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_off0000e71a.bin
eaa3bae1a2b100f42588cd11a91aa44e8ecba6c3a6ef5b26ccb407df13715df6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE71A 17728 bytes
font_01_sfnt_off000115b8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x115B8 16792 bytes
font_02_sfnt_off00012dcf.bin
f726b60a0209dae422617e2d9bad379d0090f1964df768e6cbc20825dd40dfbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCF 10112 bytes