Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e72f7a758792d34…

MALICIOUS

PDF

134.9 KB Created: 2021-07-04 21:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: eb35037b3336748d674c4d53c44c31d8 SHA-1: 098754433cdbcf2c442eeac1c56267708a3811d0 SHA-256: 1e72f7a758792d3427e83f036817831c642664c71de8f22354557e5d7043d65b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to various websites. Several of these URLs are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9217

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://garglob.ru/uplcv?utm_term=pace+in+swahili PDF link annotation
    • https://hometeamcorp.com/images/usr/79634126445.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/vevusalarakegelokuda.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/44593408060.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/naroforoboxelujulo.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9a9ea3ad8---fazefejomidapivudevudidol.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/gezanedexutekanesilibo.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c19fe54b78a---65303704734.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090e03f1b173---pupuzuximilezilaxosuxivat.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/o6o5fq92jonj1dqc65931cme9h/raliw.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/losamalutulazimevitok.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/7aa162c41d7594fe9d4a78a72d9f1d07/66337746224.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1609613f019898---gawefedadufotaj.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/37412142405.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/011618527420.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73003eb8fa---64061025192.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/0ec5d15ccda8854cfbaa536db6cd5bde/biwinixobajekeduserufar.pdfIn PDF document text
    • https://ryokanclub.com/FileData/ckfinder/files/20210618_07A367AA474C6F5B.pdfIn PDF document text
    • http://apogeeconsultancy.com/upload/files/23218370564.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8770d523a---66760820722.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/51331329964.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/7feda08bc31b3a9ced81f7d80ec6dbb5/bemitevo.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210503005436184.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/1fdc8461917b181d4eb0e62bacee0510/kemepajap.pdfIn PDF document text
    • http://lmyc.net/clients/875386/File/givup.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00014a01.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14A01 30596 bytes
SHA-256: 96d8d7abaf5890b7b15ee1cb6348dcb89b5da70cca4cd3e2f73094fbdf6b0191
font_00_sfnt_off00013bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF7 3484 bytes
SHA-256: af0c4c0156933811e8599ad8c9c144e1dabdcd45faba14e4dd51381f2e8621cb
font_02_sfnt_off000186f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00019f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F04 36900 bytes
SHA-256: 7a07b81a229bce6bdec0886888a5c606a783a4ac7f0ee0c8e01dd515fc35146b
font_04_sfnt_off0001f752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F752 10096 bytes
SHA-256: 3cf41ec028b4e480690549ce68f9d0e0f4faf607d1dc2cffa7e712c850d31cd6

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