Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de747245763a1cc…

MALICIOUS

PDF

92.5 KB Created: 2021-06-27 23:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 87867b057cf08abdaea7ad8e7b32c4d1 SHA-1: d9a37556923e29dafccea1979508567b9dad0d5b SHA-256: 0de747245763a1cce95f499f1d460f9f2ecc875f989fef6ccc93bf21f9a8d028
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, identified by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the presence of multiple compromised URLs suggests a multi-stage attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/971644a7833a94a33039b179ef6b3277/86169920378.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b80edcef87---pifazibaxebobozu.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/46e415690e55167747e1b7796d015b2c/83039584603.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/5a72aa228e10642a1825a563c1ecc875/timukipetog.pdf
    • https://abe-rdc.com/userfiles/file/mewefi.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/514e6f92d91224346dab15986a108b77/zoxebun.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081e323ba662---gumebilojo.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609001ac5e8c9---lovivelekoxaxamojumo.pdf
    • http://kolasinprevoz.rs/slike/files/45045339887.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d2b9eb76a---85740074717.pdf
    • http://izdepskifamily.com/clients/1/1a/1adacdf247316bc4617b3617d965acc7/File/61754587520.pdf
    • http://romanakladatelstvi.cz/userfiles/file/35499805659.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d62738a466---76185644829.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/1059f4a26bbdb37ec0a07691777a777c/tamikabogaxofo.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d44768ea09---42786943923.pdf
    • http://velocimapper.com//webfiles/file/zikefonogipex.pdf
    • https://sonarmusic.hu/up_image/file/30035910737.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/5233439278a8d77fc3594cd12cfd7fab/juvaxajorosaxixeso.pdf
    • http://ifa-astrologie.de/userfiles/file/xuxidotene.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a30a1ab9a---69997488647.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/7qgqrts1ened4es0fh231lmf3v/fevez.pdf
    • http://smit-electronic.hr/upload/datoteke/77651549653.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=realidades+2+capitulo+2b+test+answers
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec40.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC40 16792 bytes
font_01_sfnt_off00010452.bin
100e7a7ce73d7033cd58b05e77a4a4a1c4538821276e16d21980461ac1ed074c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10452 18552 bytes
font_02_sfnt_off0001356e.bin
746a4b5e9db4bd7646a2222c8dd51e2d106405fd96240eadc54214e7e6ba41c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1356E 10996 bytes
font_03_sfnt_off00014ef5.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
pdf-font-stream PDF embedded font (sfnt) at offset 0x14EF5 16092 bytes