Malicious PDF — malware analysis report

Static analysis result for SHA-256 874b5d6d40a05f2d…

MALICIOUS

PDF

95.8 KB Created: 2021-07-18 20:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 90019814f07410b89ce9d02de472ce7c SHA-1: 0c881c91a68f4581ab578139ce1bf4afc8ea6b4d SHA-256: 874b5d6d40a05f2d566ca35f1d2a3f412cfd748b068f51817596adc93f071a5d
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, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, with the file being identified as a phishing trojan. No scripts were extracted, but the structure and URL patterns are indicative of a malicious distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e875e12d1---lulubiragoxuvok.pdf In PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/92609527248.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/41ad5267e88fd1cf58e7af72ed9d06e4/93030074901.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad151a5f53---65851118494.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/83471401090.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/65629799504.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a1eec893c8f---nesowugutalokutegulamedu.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/didef.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607079a0bef12---xabigavosip.pdfIn PDF document text
    • https://fid-data.fr/app/webroot/uploaderfiles/25775343394.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/4oq8iaqcn6hcsv7k2h5kc6nj6i/woxokobirekeguto.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/genutorigutuxowe.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0649d6f01---sofafajevaj.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/daxewexotadobuwifofulomam.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/1c0a0a4985aa14a9804e036f576d45bb/wujuzidoto.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/5890688592.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f27af49c43---tepadedure.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/e4094a476bf2bf01effb7d75121f788f/671180299.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a45faa12ab7---75612789435.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/ruvudisidajenumesisur.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1d80e52c5---57425276402.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/91184932bd38c7be0ad3f928eaa25730/24136528529.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=console+meaning+in+punjabiPDF link annotation
    • 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_off00010514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10514 22620 bytes
SHA-256: 7446ee69d7ad0867a043684d01b9ba97a5f704185e2d43af5bc03f083074b8ba
font_01_sfnt_off00013ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15808 10800 bytes
SHA-256: 78d6133ea6f613f2a5c8934e731a7edce8263459c8c2148705f9af33ff221479

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