Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88be1becf5d86b1…

MALICIOUS

PDF

98.7 KB Created: 2021-07-26 11:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd95f89177224329c2fcb6e171107e20 SHA-1: 16c9343fd8ecb8dc811c3e10766f835756be43e4 SHA-256: e88be1becf5d86b1ce540ec0f73d4814bd413e054ee59da07c8da9aba70f98f0
216 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The presence of heuristics indicating a 'lure' to enable macros or editing, and a 'password-protected archive handoff', strongly suggests this document is part of a phishing or malware distribution chain. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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 http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cc8135ac0---75046736458.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a0f291380---93933501995.pdf
    • https://12shio1.com/contents//files/lezegib.pdf
    • http://appletechsolutions.com/userfiles/file/31727197177.pdf
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/66544585812.pdf
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/52489449201.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160bc44f708dcf---87212497919.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be9f1131845---xixobasijujuvelo.pdf
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/taxuwud.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd047ef12c---fixujadadiva.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af60a68efda---potudalurefufejizekon.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846c23b27a4---73722092649.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/7cf548db2a532bbae27dde1346048b85/wimotiperiput.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e55882d8807---tididufesopufesozuf.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/o9ki4r70a3sljfto4tseja0oh4/9146152034.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/a38c9c1f0931eb38111c447ea4ef1075/mudoxuvibuturekomirifige.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5278dd2d62---wesajageruxodozafiwowi.pdf
    • http://dekoblickfang.de/userfiles/file/lewawabubajusol.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9f69a8a9d---21130257098.pdf
    • http://verduciautodemolizioni.it/userfiles/file/jakikibosunigikuxa.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/1fbfb69815b14362c292d58c6a09e830/vepanusagakanigej.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/s773lpq19j76bo6hb218uphbj6/kediwab.pdf
    • http://splogservice.ru/content/file/17949940489.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=crear+base+de+datos+en+access+avanzada
    • 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_off00011b05.bin
161f3b5042e9bb448a265b6a3d65cfb7836b44dd6f7daaf7be968b79fff4a265		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B05 18312 bytes
font_01_sfnt_off000149c6.bin
0bfbb0217c85211e752b6eb44ea94f36bb7ad3162377da7792b0eb7ba4233200		 pdf-font-stream PDF embedded font (sfnt) at offset 0x149C6 10520 bytes
font_02_sfnt_off000161f8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x161F8 16792 bytes

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