Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d152a676a121af…

MALICIOUS

PDF

81.8 KB Created: 2021-09-19 00:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 62555c8896fb41a0d790d93f8c2aaa7b SHA-1: 3b88cd33bdc58a0d7fd502c06ba0356915549537 SHA-256: 20d152a676a121af4e2770299aa47d3133761064ca00b8c37c90788e67a23e7b
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to potentially malicious or unknown domains. Heuristics indicate this PDF is a link farm designed to distribute content, with a high ML score and ClamAV detection confirming malicious intent. The primary attack pattern involves luring users to external sites via malicious links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://emke.hu/uploads/ckfinder/userfiles/files/85195505872.pdf In PDF document text
    • https://epgeptech.hu/ckfinder/userfiles/files/busufilowusij.pdfIn PDF document text
    • http://brlairport.com/images/file/gilonaxifekagevijepekise.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/bevotowizokovowosixati.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161461e69a1072---vifasibi.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/bajezaredezasugo.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/76140892778.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210905123301.pdfIn PDF document text
    • https://ice-group.pl/userfiles/file/zumekotuxuxurebarezug.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/52831317892.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/84083222387.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/91814323006.pdfIn PDF document text
    • https://dcimx.com/files/14156165777.pdfIn PDF document text
    • http://dd-eng.com/files/files/reliva.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/bekibobukotuxinazajesexo.pdfIn PDF document text
    • https://anne-berger.de/sites/anne-berger.de/files/fkcfile/81332654269.pdfIn PDF document text
    • http://blossomtour.net/FileData/ckfinder/files/20210909_080B282B02FC9251.pdfIn PDF document text
    • http://salamatekhanevadeh.ir/ckeditor/files/files/79541033762.pdfIn PDF document text
    • http://laskod.hu/userfiles/file/zitelinezunogikiw.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/70022882573.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161387e058acf3---3652533180.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+download+movies+on+android+phonePDF 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_off0000d9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DC 17952 bytes
SHA-256: 119df9e2f22bee093cf337765a7746ae6c223727700b480fa072dc8154fcc478
font_01_sfnt_off0001089d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B4 10800 bytes
SHA-256: 1d54dcee3442d501b2ed33bb0bd55e3e87da7cf9856b3024f31436a01b957d69

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