Malicious PDF — malware analysis report

Static analysis result for SHA-256 674f40950da12f1b…

MALICIOUS

PDF

92.3 KB Created: 2021-09-20 09:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 097e5fe45e05582945cdab1d6433b5a6 SHA-1: 584903513eab21513e09d9a99bf7e774697eccec SHA-256: 674f40950da12f1bed672a62e5edb19e63510462d62c56343475ef5b3a854572
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lead users to malicious content. The document body is heavily obfuscated and unreadable, but the heuristic firings strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://swatimishra.in/uploaded_files/userfiles/files/64215951748.pdf In PDF document text
    • https://shinaltd.ru/images/file/11168758076.pdfIn PDF document text
    • https://laatuwhuisweerstralen.nl/upload/file/dibal.pdfIn PDF document text
    • https://photopoligrafic.ru/ckfinder/userfiles/files/24150530493.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/74457621805.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/9697243711.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/dogamujitebizide.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16147a9d367864---24512509800.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/51a0ba118ce2d3dd475ab4a15ddb0c6c/suzezerafabamobe.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/51371136185.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/19504715152.pdfIn PDF document text
    • https://telenovella-bg.com/files/zofazisofitonawurepe.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/ruvibuwosedo.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210904042508698.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20219111723152054.pdfIn PDF document text
    • http://katela.net/userData/board/file/75494022655.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd12395993---figejugim.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/76d57fc4dc798cc5714be601008d8f21/titejudokemola.pdfIn PDF document text
    • http://760_709737661.mildmedia-dev.eu/uploads/userfiles/files/nagolazigaxarimekut.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/37135801401.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/84120558392.pdfIn PDF document text
    • http://daejonggyoyc.com/userfiles/file/20210916102050.pdfIn PDF document text
    • http://parkingparts.com/Upfiles/file/11750317284.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614207866664a---46321107927.pdfIn PDF document text
    • http://djpress.pl/Image/files/ropamezojujalewifuv.pdfIn PDF document text
    • https://firstview.christoff-design.com/files/buragito.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/65933679690.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=photoelectric+work+function+formulaPDF 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_off000101a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A7 10712 bytes
SHA-256: 6540f740a0af695582986909d85c92ca97d9c76596329373236a0cbe28dbd6af
font_01_sfnt_off00011a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A20 18680 bytes
SHA-256: 2a39011e286568147501c3956fb5fe3694a2254a477ee6ba20775d9a9bbabafa
font_02_sfnt_off00014b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.