Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e082c03237dabdc…

MALICIOUS

PDF

92.2 KB Created: 2021-08-08 05:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ed6af342329d026d4b26b8b8a6a0e35c SHA-1: eb5038b83b88c9dad93512ce12c0dcddcdf8019e SHA-256: 1e082c03237dabdca9c574ad93b2b50225ad62584fa36f54f90f51a21e2e30d0
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to various websites, including compromised WordPress installations. The presence of a 'download' button lure further suggests an attempt to trick users into clicking malicious links, likely leading to phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://queure.ru/uplcv?utm_term=ableton+live+10+crack+reddit+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C PDF link annotation
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/c84235dcdb87234dac1da7c492a9109b/safuwikezitoxefibatutu.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/71223722400.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/tuporanizizukunogaxas.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/4573535671.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8b335e0410---wokawerubabiw.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/16695433510.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c18d455eae7---37144636742.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/23479983232.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/354714ef971dc0c6b80b7c8d6ad61644/wabenulewekulu.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/p5p87sc9su6mrhtbd7pi2iqaji/57981265489.pdfIn PDF document text
    • http://ucity1967.com/clients/f/f9/f95c10655bf48216a4b8c8e4321ec146/File/98119258768.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b31c45204dd---pefurasudolasovosoto.pdfIn PDF document text
    • http://dnepropress.net/files/file/gumodifogigelujojaso.pdfIn PDF document text
    • http://barcelonahotel.vn/UpLoadFile/file/1118794218.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/60990db322e48b19fbe798e768ed17a4/taxenizaros.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bd88cdb603d---tujudukelixugalapixabavi.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d27864aa0---86622847901.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/76573377141.pdfIn PDF document text
    • http://cathugo-catamarans.de/res/wysiwyg/file/90621244981.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/nebosajelukeriwinufam.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b48b33cbe0---67038066083.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/gijupup.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210616173702.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/kulalutojusesidokes.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/c4dca0ef98e0db6a9c7689d04f51c994/setinufawuwevowipidaluv.pdfIn PDF document text
    • http://thuonghieutoancau.vn/uploads/files/52389811536.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_off0000fee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE4 17892 bytes
SHA-256: 57e22cba5642208a4254f99507209b9f459c2a679472c6ab664ccd1b92a268b5
font_01_sfnt_off00012e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E28 11288 bytes
SHA-256: 14f0bdc7abd24769d22da1446fed2a33ab92845c08461b51fa6496d93feef0aa
font_02_sfnt_off000147ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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