Malicious PDF — malware analysis report

Static analysis result for SHA-256 db5747b208f896e1…

MALICIOUS

PDF

94.6 KB Created: 2021-06-27 06:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef5962f38fd70d9e7c9cd24ab72edcfd SHA-1: 26b305450af4a91a1af09e452d6e48dfa666cd27 SHA-256: db5747b208f896e167b7be49e27805f23b1d05d59a57b909c7139aff6d7a71b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains a link farm hosted on compromised WordPress sites, indicating a likely phishing or malware distribution attempt. The presence of multiple URLs pointing to disposable hosting and compromised CMS uploads reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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 http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8c8edbc8f---27667121361.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/a3cacd3f27a7923e07cb9b2cbdb7e86f/57262458555.pdf
    • http://falconartistmanagement.com/ckfinder/userfiles/files/riwogofafib.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/dab5c9ed38cb80debe7df303dfed7b2d/30543387881.pdf
    • http://guides2alpes.fr/uploads/file/nobuxez.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/a1b739802c70d598e2c2980ed61cdf97/50375542725.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7f0ad4477---49749098947.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb784eba78---dakubijepugokuki.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/fbife89oogriahqq0ptaoke1u4/75299706623.pdf
    • http://dlikefulproductions.com/clients/875850/File/wododoxofatirixorupegani.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6eff618f7e---wufutuvekafakelosud.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160abc9b3ca600---kaxizovavilifufinupup.pdf
    • http://softwarefactory.nl/images/file/4387774748.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071504e51baa---64272563115.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bd19148d9a7---15401360396.pdf
    • https://securitydm.com/slicice/file/nekonotitozurezorugoduv.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160921de472748---55884683140.pdf
    • http://nemdanangpho.com/uploads/2021-06-07/images/files/zusede.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/fa2cdaeb18155a4ee770c3ef1307daf9/gesanovasukopuje.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/c7e0ab8877d443388f884f6771bd4366/bakemofeluli.pdf
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/66249696926.pdf
    • https://aartipalette.com/userfiles/file/39611431757.pdf
    • https://sportsht.com/userfiles/file/26515485640.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d684c494ca0---74267223627.pdf
    • http://biotop-zamosc.pl/userfiles/file/jiseguwowelewan.pdf
    • http://momsystem.ru/public/file/fasixogitatimebonafojane.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=oracle+bpm+interview+questions+and+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c6f.bin
2715097c530f62fa4303fe1ae5e4c469ca97771054d4104e140bbef44e14990b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6F 11236 bytes
font_01_sfnt_off00012662.bin
aa821a3da4a716954fca90f4dcc473d1404a030ac9ab9a5c2a2e3943b4418e6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12662 17636 bytes
font_02_sfnt_off000154d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x154D7 16792 bytes