Malicious PDF — malware analysis report

Static analysis result for SHA-256 565ad396ef6545d8…

MALICIOUS

PDF

95.9 KB Created: 2021-09-16 15:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 317fc7f1780800d0baf7df961bfe38e1 SHA-1: a907df36ca9b1491748ffc857918bb51008e0b19 SHA-256: 565ad396ef6545d8651023b9f7cb9e7466ae700f01475dad2df348549ce73339
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/15983295213.pdf In PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/gaginaweromofanupuko.pdfIn PDF document text
    • http://synphabase.ch/upload/file/5329189126.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/37802643662.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021090406215032.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021090614470680554.pdfIn PDF document text
    • http://rtm-plus.ru/ckfinder/userfiles/files/86709887167.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/72545798211.pdfIn PDF document text
    • http://curvesncontours.com/userfiles/file/57900096928.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/61983018058.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/95229594749.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/xasugowadofiseraf.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24487242596.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/bamakofiruwunajakezasena.pdfIn PDF document text
    • https://matteagianotti.ch/userfiles/files/koletimojomumoropefin.pdfIn PDF document text
    • https://majubesar.com/contents/files/95155319609.pdfIn PDF document text
    • http://25630638.kad.tw/kads/ckfinder/userfiles/files/32692306755.pdfIn PDF document text
    • https://anakaygame.net/calisma2/files/uploads/32884663711.pdfIn PDF document text
    • http://vstarmp.cn/upload/files/20210901_184801.pdfIn PDF document text
    • http://hflchw.com/upload/file/47897258329.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/bubanubukirarunu.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb92053a94---litekemivugipapexi.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/65667081217.pdfIn PDF document text
    • http://bibliotekaludwin.pl/img/upload/files/17261307582.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/60949619536.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=index+of+arrested+developmentPDF 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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D13 19924 bytes
SHA-256: f185e9688540019c362c883fdbb007d2c63bff3c985b5f1f88a6ab187f92bf86
font_01_sfnt_off0001419b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1419B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000159b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159B2 10684 bytes
SHA-256: 48e920ae0cc16a98db33cc7a826cf8c09bc12a6dc5148880c81523cdd9f35b6b

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