Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0d2b5a99b424bf…

MALICIOUS

PDF

75.4 KB Created: 2021-09-16 10:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c02b92054acb8d4905a39f84e0764c27 SHA-1: e06e866d0ad96a362135eaf9fbb8494bd1109902 SHA-256: 0e0d2b5a99b424bf379565bc0353869fb1fd7ae26ff2ba35749b63101484d469
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents that leverage embedded content to achieve their objectives.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://fq.ua/images/file/54038181739.pdf
    • https://rotterdampools.com/contents/files/katopekupumivul.pdf
    • http://prtourusa.com/FileData/ckfinder/files/20210915_AAC19544A2AC3F85.pdf
    • http://transgusto.ch/userfiles/file/vewuva.pdf
    • http://hanleyresources.com/images/weminasiva.pdf
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/joxuwofosuguroneg.pdf
    • http://ingmontagna.com/userfiles/files/tusolesatezipudim.pdf
    • https://armenia4d.com/contents/files/pozirabeg.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16139004dc1ef8---36405847580.pdf
    • https://mmagame.com/userfiles/file/68908416289.pdf
    • http://bptramptour.pl/files/file/newefidapi.pdf
    • http://eric-parnes.com/ckfinder/userfiles/files/jupatob.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/53994482443.pdf
    • https://eirai.org/editor/ckfinder/userfiles/files/tetaritilowawowemizanuraz.pdf
    • https://ever-progress.com/upload/files/61658378813.pdf
    • http://srilakshmienterprises.net/uploads/leribenodurobogeka.pdf
    • https://artistprasanna.com/userfiles/file/nolupasoruj.pdf
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/volevinolinezuwatubexir.pdf
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/menowipaderatulo.pdf
    • https://nikolsbeauty.com/webroot/f/uploads/file/radudejitijisiwuzolewofig.pdf
    • https://mobiligennari.com/userfiles/file/24418340933.pdf
    • https://psihodesk.ro/ckfinder/userfiles/files/dowixa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=gta+5+ralph+ostrowski
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb82.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB82 16792 bytes
font_01_sfnt_off0000d399.bin
15dd6108a7ef3919da602fbe87da65a32bcb8130acf6e2cd2e6e8e0269315cd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD399 10464 bytes
font_02_sfnt_off0000eb9c.bin
78dfeab52ed07dc1e5813aefd62a846ec1e36224dd94156561b9e6da19de3f15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9C 21428 bytes

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