Malicious PDF — malware analysis report

Static analysis result for SHA-256 322f617915b0439d…

MALICIOUS

PDF

77.7 KB Created: 2021-09-05 09:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a700d9d1ee4bc640213c7c2f63dcc708 SHA-1: 18bc16828d18bf777fae150cc2f10a88c38485f4 SHA-256: 322f617915b0439d2262d582ab76d89f9366eef68ad2d848e338220050708bd5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/natanesavizize.pdf In PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a864ded38c3---wegovasiwosovipiwezigije.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121a6711f5d3---70851260093.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/a0d065c28dd48948db408eb960be4d18/gopogepumudufatidilagi.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/33db79ef9818e784cee485995d8cd2cd/pezolixapebivesig.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/56102989416.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160948a844cc02---9248406049.pdfIn PDF document text
    • http://gardatrans.com/content/Files/pawidakosujozobeguzox.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/52735029873.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/78835123612.pdfIn PDF document text
    • http://geyuping.com/geyuping/uploadfile/file/2021081402420573499.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/47513338151.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//67824786275.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/fuxomerivovibajerebaki.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd7f850244---87012479567.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021081600170020.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160a31f6367581---59456775865.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/51800885132.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/nifos.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082d048b1b6c---rasax.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/15058302629.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/30093989606.pdfIn PDF document text
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/61785718604.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160842fca17df2---62290025269.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/bixodovore.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=value+added+tax+in+nigeria+pdfPDF 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_off0000cd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7B 16804 bytes
SHA-256: 3643f0b9b6e37d4180252c15c37608ef79496558fb2bb212bdd06cf33643a74e
font_01_sfnt_off0000f89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89E 10556 bytes
SHA-256: bb35ca7083e8877c62a5648e658b6d1cc4413330e2207189d544eec205556bba
font_02_sfnt_off00011094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11094 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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