Malicious PDF — malware analysis report

Static analysis result for SHA-256 18343dae494d6d71…

MALICIOUS

PDF

69.4 KB Created: 2021-06-12 14:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 69e971b9e1225e718a420bd163d09d14 SHA-1: 037e65ccdac84e24d49058183a7d13630ab774c2 SHA-256: 18343dae494d6d7186cbd7eb99094e2317a90bbe0f55556aa78e016c5be52fb9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting it functions as a link farm to distribute malicious content or phish for information. The embedded document body text, though partially corrupted, contains a phrase related to 'blackjack' and application metadata, which are likely decoys or part of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://allytemp.ru/uplcv?utm_term=in+blackjack+if+you+get+5+cards PDF link annotation
    • http://razaviota.ir/basefile/razaviotair/files/sebemefasonujazulogu.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf9324798---zuzexodofe.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/bofezalimowekubadetonolu.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/44865825146.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16074092942a66---bilegozukev.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/03531d4bcbbab9dfeb58212f2cfd42db/miweletadipoxesado.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/norivupetele.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ee85beee7---zejevovakifudi.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/43516acfe98bd89dcd19bb7ba4a6ee15/55364073471.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/fosanaxezitirepefotupak.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/bovopepovitijusanavunag.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c64baf1759---tosikimoso.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/slt3ok0il773k34p2e1fpkn81a/90544348780.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/munerumebuwavidak.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c71b62c133---14895274334.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/5ba737e19b5b51497199b457d254bc96/9147777028.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F5 5632 bytes
SHA-256: 76b2ff5191bfa83745a90dc1cfd969fa504ad17a07a0459835e0ee99bad7d30a
font_01_sfnt_off0000e641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE641 10016 bytes
SHA-256: 08a59eb7c527201a75aef8f692539aeef54eccf1d30f5cdec15e70f746a83322