Malicious PDF — malware analysis report

Static analysis result for SHA-256 2554ea188c0cf18d…

MALICIOUS

PDF

69.6 KB Created: 2021-09-25 03:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 05e221978328cbfa502416307cd7b32d SHA-1: 39489c9155e0b642e972b2c23a228d99e1265387 SHA-256: 2554ea188c0cf18da3ee371ec94fcadf03e5791397796d77a86830fecfa6d556
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The `utm_term` parameter in one URL indicates a potential lure for users searching for specific software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://infrive.ru/uplcv?utm_term=inshot+hacked+apk+download PDF link annotation
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4835bb7a3---52180483704.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141b7ab00bed---vegasedatuxazuromir.pdfIn PDF document text
    • http://nwatchonline.com/userfiles/file/pomejupepal.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/namigojefid.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/90488481760.pdfIn PDF document text
    • http://ha-sine.com/d/files/saramelegevoxawudidikufi.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/vibomanatekagawituxone.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/47587712697.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/xabolufifurudodozeput.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/37419938733.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/60821298525.pdfIn PDF document text
    • http://ohxto.com/uploaded_files/userfiles/files/91030214849.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/96519626478.pdfIn PDF document text
    • http://www.trackls.com/application/ckeditor/ckfinder/userfiles/files/turunopipaxosovi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7eda2254a---36967247144.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/lugiwaladokisoroxumaj.pdfIn PDF document text
    • http://frankifoto.com/uploads/pages/files/zupolidubofogaxawugit.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/16057041747.pdfIn PDF document text
    • http://cabini.it/userfiles/files/70240419504.pdfIn PDF document text
    • http://yingtailong.com/upload/file/2109060448547480602pz9ywtn348r.pdfIn PDF document text
    • http://ktcz.eu/files/files/62363736826.pdfIn PDF document text
    • http://vibestedu.com/_UploadFile/Images/file/56955259291.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/zowumosamupolizadukutaz.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/b508250c2408f5426970d8e702038c0e/21186235043.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB09F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B6 10548 bytes
SHA-256: 60ff7bd23a35dfa5521c41621fb8d02ca1b9d9327f285ab7a3f3cdab24f9dcaf
font_02_sfnt_off0000e0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C5 15904 bytes
SHA-256: 8b2929c4c28d88dd2c5b9a35e6d34d2d8656cb150d76c129775bf953008ae459

Open this report in the interactive analyzer, or submit your own file for analysis.