Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae9f579f3fd840d…

MALICIOUS

PDF

80.1 KB Created: 2021-09-08 22:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: eb2fd0cce2408397803c45492a52be27 SHA-1: 2762b148a9b0f68e7c2bd4201237d51dc2e45519 SHA-256: 1ae9f579f3fd840dffaee9d846504c2edb380d74a1a848247d7a9903080e3540
146 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs, many of which point to disposable hosting and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of an IP address literal in a URI further supports a malicious objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://turismopontevedra.com/ckfinder/userfiles/files/dugupunupivoximewetov.pdf In PDF document text
    • https://mai-avto.ru/upload_files/file/94522800691.pdfIn PDF document text
    • https://detectagsafety.com/ckfinder/userfiles/files/tumanuj.pdfIn PDF document text
    • http://abwvictory.com/uploads/files/zijunigofenuzub.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/24137702937.pdfIn PDF document text
    • https://advik.net/userfiles/file/96477757109.pdfIn PDF document text
    • http://fgsconsulta.com.br/ckfinder/uploads/userfiles/files/53872379554.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210906020246.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/firipiwerepakenofipo.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/62074301994.pdfIn PDF document text
    • https://apgr.eu/UserFiles/file/18193410931.pdfIn PDF document text
    • https://csp-pub.com/stockages/files/17218487953.pdfIn PDF document text
    • http://chuabenhxuongkhop24h.com/images/files/53938687656.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/wofuvutaludifigon.pdfIn PDF document text
    • http://ccshecea.org/upload/files/kosekivobobokujegasufoxid.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138461d48478---vovanepofi.pdfIn PDF document text
    • http://chrisdepanneservices.com/Sites/cds/files/pubugodobonad.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/23443140592.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1613706d3486c5---torozaviben.pdfPDF link annotation
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138db5316650---xurezitejuzawimefiw.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/kixenaxixeginirutowe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=mejores+apps+de+dise%C3%B1o+para+androidPDF 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_off0000d386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD386 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB98 18192 bytes
SHA-256: 6d1c36248cd511a2e5b34c427e30b955008e3f59d389d639eaa0098e046d0b14
font_02_sfnt_off00011947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11947 10572 bytes
SHA-256: ee19e66c5361172e2f75a3ffbd27243b8b6c23ec71b84dfd74ff656d353393e1