Malicious PDF — malware analysis report

Static analysis result for SHA-256 c649c0ae7a799aad…

MALICIOUS

PDF

87.0 KB Created: 2021-07-15 19:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d4fb3e40d34013a65fef359b347c7799 SHA-1: c209851cb9bf2b140bdd187edb672bf3a5adaa32 SHA-256: c649c0ae7a799aaddeb9e3f2b02a9f2b37187af355492bedf855d695e9010c49
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://garglob.ru/uplcv?utm_term=watch+psych+2+lassie+come+home+online+free PDF link annotation
    • http://andrelandberg.com/userfiles/file/4726045422.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/3c682309fea1fd1f7d1cd88017eb33e3/torulib.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/80676445426.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/sozegev.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/5k0r6sf9ppekteu04mc9ai67o3/20233875428.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///tenebokokon.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/3aee0447c81a7c92f6b154c0c1f82d29/ziwapupun.pdfIn PDF document text
    • https://mfdesign.hu/files/file/biputurekig.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/a637bcd87fed8f4d3b8372bfab27e2ce/63772576210.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/fozomezolafakurinedubas.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/sapakivaxiruxuwexufevi.pdfIn PDF document text
    • http://vinhthuan.asia/upload/files/fuposativarekixezezes.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/31200266717.pdfIn PDF document text
    • http://adbuffalony.com/uploads/files/54423882101.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/wonatawelojomoroxap.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a2c0ee49e---82767021336.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/afd0bcf206b33c717feeb21d3fb09d7c/vanonelikujagezimofaximil.pdfIn PDF document text
    • http://nhaphangmy.us/upload/files/9870090451.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/61045983054.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/86838789342.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/lafagilizarikediluxe.pdfIn PDF document text
    • http://ucity1967.com/clients/f/f9/f95c10655bf48216a4b8c8e4321ec146/File/xofozujetotavube.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/wuwetitedote.pdfIn PDF document text
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/pogoz.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/43559431804.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/ad11145a2ab2944282beda98f49995fb/48217090069.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_off0000ecc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC0 10972 bytes
SHA-256: 8a33d13a4f509a2bac0085e14882e38801fa4495b8f5303f02f5ac6a985d17d8
font_01_sfnt_off00010625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10625 18264 bytes
SHA-256: 7748415614bae283240c83b016721991d960452c6ac471eb1dce0f9d14ee9099
font_02_sfnt_off00013653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13653 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1