Malicious PDF — malware analysis report

Static analysis result for SHA-256 61eed22e78d01890…

MALICIOUS

PDF

76.9 KB Created: 2021-09-03 02:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 392ee884a3a73a158efc1e70a8b9c9e7 SHA-1: 7c8a13f366e5fadb8eccc7fbd3dd3c16c10631fb SHA-256: 61eed22e78d0189086895d4868dde384795978d554c3cc68aaf39f23ddaf5249
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it functions as a link farm, directing users to numerous disposable hosting sites, likely for phishing or malware distribution. The embedded URLs, despite some being marked benign, contribute to the overall suspicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://rulife.ru/ckfinder/userfiles/files/11181157105.pdf In PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/61400542830.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/jogerekobesuragaliri.pdfIn PDF document text
    • http://yilip.net/userData/board/file/61624491219.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/jiwezizejirit.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16119fe7d94f29---vugetinexa.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/ragiku.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/64657025081.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/46169410364.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/zobikokosuroziziva.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/197082011.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/pejawalasagozenelukufafev.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/pogitifisodam.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/sogaxerutijowelapoxoloweg.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/lejaloxip.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095889fc0abc---74940935600.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/78046834690.pdfIn PDF document text
    • https://davaocarrental.com/images/file/88215257651.pdfIn PDF document text
    • https://turasmobilya.com/img/editor/image/file/misebefopagun.pdfIn PDF document text
    • https://gangnampools.com/contents//files/kesof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=oil+painting+for+dummies+pdf+free+downloadPDF 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_off0000c6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE3 17896 bytes
SHA-256: 6b0d66160b57fd3ea3f9848e8c276c384c9429404fd0de25a46e988ae3248c19
font_02_sfnt_off00010cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDF 11052 bytes
SHA-256: 03a7faa12478eb89191a7f94485e43dbda279d934b05695eaf9c7a163c1f862f

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