Malicious PDF — malware analysis report

Static analysis result for SHA-256 789ab47b005e4fa2…

MALICIOUS

PDF

84.2 KB Created: 2021-07-25 01:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 078eefcbb612ec8649b197c5bac6ae6b SHA-1: bee71fd530880f0a3ceeb0b02371539fff80f029 SHA-256: 789ab47b005e4fa2677cb935b162253e159133d09eecdae9bebbfad248ed3dc8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous URLs pointing to potentially compromised WordPress sites, likely serving as a distribution point for malicious content. The presence of external URIs and link farm heuristics strongly suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a818f73807---70641477015.pdf In PDF document text
    • http://christopherdallo.com/file/zisolowe.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb59aa126b---44429557486.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cefe8d6de00---puzotigizemaxiwapizo.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/xogokoretapevosotamub.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/57520390197.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/1ng1fpm64h4j032me3vp78gj51/lenisapodola.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/85370458103.pdfIn PDF document text
    • http://vigova.com/Images_upload/files/37022559341.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/kcc1jgmt66i6d5ob4tc9k66gqo/86430847989.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/bagalidupisipizasoz.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/ziwixilavarozi.pdfIn PDF document text
    • http://goref.ru/files/file/98032219769.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/72202640010.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5da40ef91---69616122839.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/41229213528.pdfIn PDF document text
    • https://moolans.com/uploads/files/tavumaxasolovujo.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/85796221617.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/39131649495.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e659d1905cd---95712699202.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/11670592128.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085b3c3cb1db---46889910114.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/114ad04d76b94124ad76d721dcea1f4c/powirareniz.pdfIn PDF document text
    • http://daycamhoa.net/upload/UploadFiles/files/46123774921.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=ibrahim+tatl%C4%B1ses+mp3+indir+fullPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC01D 18224 bytes
SHA-256: e831e1c7863f6061827fee2535fbd96ea524d3884e590fe1c90d3d8cefdfc12a
font_01_sfnt_off0000ecb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB8 19924 bytes
SHA-256: 419813412e832be2556e37dee0e0f0432a9ca9f33941b834cb18126cf8467f7f
font_02_sfnt_off00010ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000126d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D6 11052 bytes
SHA-256: 1dc2b968047b3641fc48575e83bda6a8c7721561101f77b9611c431b97ffdd0b

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