Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d6d8a016822dd2…

MALICIOUS

PDF

85.9 KB Created: 2021-08-15 06:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: eff1cfd2330f221200d5fa9d443b8b87 SHA-1: e9985a408eb2dea67a0e5006e8d91165ef2dc9fd SHA-256: 73d6d8a016822dd2b97111e71c871a1edcbf9017bf0d6786351d0ffc562f01ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://bpsstudio.hu/uploads/32254268337.pdf In PDF document text
    • http://tupnate.com/ckfinder/userfiles/files/lopejitowirudawow.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160f80f7967f56---72194795486.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6ece83b2f---gonez.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/44989439100.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71014d0e7c---ninozedulavokagave.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/56954315449.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/risisukapikofebirusip.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607930130da5b---xavagolegugo.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/kovit.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/lebumalikozuk.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bdd36aebd---xixafudod.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/18446628349.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a14731c23e3---manubogewunu.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160b2120339386---84357268253.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8038cdf94b---terosowedeb.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/rofozerapejewo.pdfIn PDF document text
    • https://casalindasbakery.com/ckfinder/userfiles/files/29628490687.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/semimujef.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/91516733264.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/5db62db618ef0ca0a98c34503713a6f8/66844144404.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/vajikexepepefukemibi.pdfIn PDF document text
    • http://dzbnf.com/upload/file///78635194482.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/86237069743.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=la+campanella+guitar+tab+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_off0000e971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE971 10872 bytes
SHA-256: f2f50102240fcc562abd0dbde391ab0ea7c093e4ddcbee371521cebc15d87324
font_01_sfnt_off00010215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10215 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A27 17820 bytes
SHA-256: 92f464c351d4f9197bbdfea0fe2616b552024c4cb7d524b5e9e1514cf57112af

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