Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5ece7d07138b5b…

MALICIOUS

PDF

77.8 KB Created: 2021-06-29 13:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5f4c326494239a6833081389683320c3 SHA-1: 5eed503f0b2d3ad03e298118d66977494155afa5 SHA-256: bd5ece7d07138b5b12643cfd893e09e95b5f892d00becadb72ca27472115ffd1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV heuristics strongly indicate this PDF is malicious, specifically identified as a phishing trojan. The document contains a large number of URLs, many hosted on compromised WordPress sites, suggesting it functions as a link farm to redirect users to malicious destinations. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures or malware distribution campaigns.

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://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/e73dabce72fc9ff04debafc786248fc2/xujalejigilegutimiratonun.pdf
    • http://lookkorea.net/userfiles/file/83059527351.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/53762634366a79e7144212d43746eb3a/30820986312.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/0e2e049d77105118096580aa7cd417cd/babore.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078973ade258---13752951381.pdf
    • http://cokhibaosang.com/media/ftp/file/duwapojutijolibigonomonob.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/h5hbaf42llonool466chjspkm6/54528266844.pdf
    • http://ondrejkocar.cz/img/file/risunerux.pdf
    • http://interel-rus.ru/test/sites/default/files/file/miluraxavalisezifax.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/h27ea8qakqhjpusc14hq6fnvk1/sagusakigep.pdf
    • http://afghansolar.com/userfiles/file/39075768711.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/8ac3d584471dfc88bdd7c839379aea0b/sodemenipud.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16088257362270---sagurafunafotugemufude.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b59edd556c5---16524645848.pdf
    • http://abimobiliare.pl/pliki/File/zamafurekuwo.pdf
    • https://mintedimages.com/ckfinder/userfiles/files/18763069172.pdf
    • https://baptistfriends.org/media/15832759282.pdf
    • http://aarogyamedico.com/userfiles/file/xopijefilazopef.pdf
    • http://dragonera.cn/admin/userfiles/file/7492253839.pdf
    • http://mtecommerce.it/public/news/file/ribanefulagogatunoke.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=bring+sally+up+squat+workout
    • 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_off0000cbb0.bin
9869e1cbfae1a46edd10173eabe8b943cfae3d8f9e7c3d2b040906ba91aab5ae
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB0 10888 bytes
font_01_sfnt_off0000e4c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C5 16792 bytes
font_02_sfnt_off0000fcd7.bin
a702a73854bbbbc32d8c8a33a22d069b4ab8e8bb0a03f09c415a4e50f98dd572
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD7 17348 bytes