Malicious PDF — malware analysis report

Static analysis result for SHA-256 9065a8fd78c2da96…

MALICIOUS

PDF

81.0 KB Created: 2021-09-18 02:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 68e4ea34356efb876508d6a1950dbc2d SHA-1: c8328dcb1a15fd6155408d0f28d16a7aa816b8c2 SHA-256: 9065a8fd78c2da96befaaf0ceabf098e8fa0c6d9d41a55c38952380659ec93ac
126 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV and an ML classifier as malicious, with a high-confidence detection of 'Pdf.Phishing.Trojan'. Heuristics indicate it functions as a link farm, directing users to numerous external URLs, one of which is `https://archism.ru/uplcv?utm_term=official+life+in+the+uk+test+android+app`. The presence of multiple external links and the nature of the detection suggest the PDF is intended to facilitate phishing or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://archism.ru/uplcv?utm_term=official+life+in+the+uk+test+android+app PDF link annotation
    • http://dkind.net/userData/board/file/56019957021.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/kozazozuwedu.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614220ff722e8---76293754431.pdfIn PDF document text
    • http://xn--b1adrijbbb.xn--p1ai/upload_picture/81818325045.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/geziboromo.pdfIn PDF document text
    • http://jjkxmy.com/upload/files/202109051648041454.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/xutobor.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/76113020472.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/24469128162.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/69124195361.pdfIn PDF document text
    • http://ashokarefrigeration.com/userfiles/file/23304906186.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/bepabaredumagexuso.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/64612893982.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/votagiroduzikoramexobip.pdfIn PDF document text
    • http://cocoal.com/uploads/file/dakipe.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/nurizir.pdfIn PDF document text
    • https://typeone.com.my/ckfinder/userfiles/files/lixoxat.pdfIn PDF document text
    • http://www.yt333.com/userfiles/20210914/file/1631571701.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/kalitisujilekolojarin.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/1ec60ee87b09900d9e1ca8fb80b62741/ketilaforokirunugikusero.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/16208838782.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/46637150824.pdfIn PDF document text
    • https://korankertas.com/contents/files/26901729789.pdfIn PDF document text
    • https://jck.ro/userfiles/file/52564576361.pdfIn PDF document text
    • http://launensia.cz/ckfinder/userfiles/files/poluvew.pdfIn PDF document text
    • 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_off0000d873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD873 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF085 17324 bytes
SHA-256: e92b31b7a37aa3cf3c14dd881e352b1f6954451026ee6ba7e6dcc7f94cc70add
font_02_sfnt_off00011d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D60 10932 bytes
SHA-256: b7fe2d5866c20588534e599ebe3ffa1bcfbfd78bd9479306ffdd6f4bae75784b

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