Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a9892ec00955f9…

MALICIOUS

PDF

85.7 KB Created: 2021-09-17 14:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 4e467da9a3b0db0af64cec452c752f8f SHA-1: a726bfdd22fad64084976de7cf88d4fd4de6553b SHA-256: 64a9892ec00955f9bacc5610b57bddf5205e0dc2a9d76e0d664a5bcc508eca08
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The heuristic 'SE_QR_LURE' also suggests a potential QR code phishing attempt, though this is less certain without the QR code itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://laborke.ru/uplcv?utm_term=wifi+password+lookup+android PDF link annotation
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5234125449.pdfIn PDF document text
    • http://energywork.pl/userfiles/file/51011454266.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/setopuxopujuzixupif.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/lagifoxuzisomunozabowajoz.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/dojobesujiwepesizup.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/sojubixila.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/56977586477.pdfIn PDF document text
    • http://miyagi.chi-kara.net/Upload/files/89021862746.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/vapimufidewusiwujururu.pdfIn PDF document text
    • http://guchen.ru/d/files/purubexuxele.pdfIn PDF document text
    • http://khautrangkhangviet.com/upload/img/files/46873926637.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/rojetejekopinej.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/gutowalemimezuxonuziju.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/8f01e4f87394ef997433abadb85d8018/nutewupibikixovenaxax.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136575c6cb3b---33350240896.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/71112808712.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/80689171829.pdfIn PDF document text
    • http://ceroki.com/image/files/ligarulozu.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6383b8f08---78701695536.pdfIn PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/sebefamugivedu.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16134d27797dfa---72694556355.pdfIn PDF document text
    • http://teedinmaesai.com/user_img/file/15280786624.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161330cf4b365a---78492074548.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/b6bdec819981a627615126c05dc925ff/gilege.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/72857011604.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/sibosofizajuwuni.pdfIn PDF document text
    • http://nakakinpump.kr/fckeditor/upload/file/loraputapitijusu.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_off0000e94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94E 18088 bytes
SHA-256: 68b257db87f49a1019648112765ea0993664202b9bc8d402a421b3ac655ffd72
font_01_sfnt_off00011879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11879 10532 bytes
SHA-256: a26a243185210e6ac522d30ae2b1240265eaa2cd15083b4fbfd6c314dd32cf1f
font_02_sfnt_off0001308e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1308E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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