Malicious PDF — malware analysis report

Static analysis result for SHA-256 0859f7d198c6b661…

MALICIOUS

PDF

87.0 KB Created: 2021-08-08 18:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 379f58080bd55dbf0ce9a647ef0b4245 SHA-1: 5aaf7592bae298561b96837afc569ffb6a5d83e3 SHA-256: 0859f7d198c6b661a6aedf12e21d5495038404f797765c5b851d4ee52b0bceec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains a link farm pointing to compromised WordPress sites and disposable hosting, likely serving as a lure to malicious content. The presence of embedded URLs and the PDF structure suggest it's designed to redirect users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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=increase+microphone+volume+iphone+7
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f34a833762---98695198120.pdf
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/73838894407.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607af077799cc---71620613337.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/u5cpkbgu5mfem3n8qapilf4rog/36487926212.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607288397e347---58893498158.pdf
    • http://anaminfo.com/attachfile/file/fafebuvozisag.pdf
    • http://energy-labels.com/userfiles/file/44138625445.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6dc59bad5---41783760310.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a27504eba65---tutiferi.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925f9554f13---mosuwusobijifeb.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1247b071ee---zakarafidokemogog.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607845374ef91---86362346027.pdf
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/jipagawofobaxafam.pdf
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/34118287828.pdf
    • http://shethof.ch/cgi-bin/dynamisch/file/batedikurofekojidene.pdf
    • http://forumcutuca.com/ckfinder/userfiles/files/bewizilivemu.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92ee4df1bd---77341953323.pdf
    • https://inijariku.com/ckfinder/userfiles/files/vugowogux.pdf
    • http://systemsbiology.at/uploads/assets/file/76325004771.pdf
    • http://sbs-group.co/userfiles/files/42539367867.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f593b22f22a---javodizimilud.pdf
    • https://papersacksfactory.ae/images/bulk_images/files/nugukojazidodexiz.pdf
    • https://srmresidences.com/images/bulk_images/files/todawer.pdf
    • http://php-lounge.de/userfiles/file/44977301539.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/66403b2ec0ec0fadd1e5fb6e5ceab18b/73324456782.pdf
    • https://forums.imore.com/showthread.php?t=376305&s=5a34f738cf70d2d5f4dd2700b0368966&p=283767
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://forums.imore.com/showthread.php?t=376305&s=5a34f738cf70d2d5f4dd2700b0368966&p=283767
    • 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_off0000eee9.bin
6f13da106dc2f69d1ec55f087baab585bbc4e7be3199eb0e931cc14076987de4
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE9 10708 bytes
font_01_sfnt_off0001074f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1074F 16792 bytes
font_02_sfnt_off00011f61.bin
03fb939fcb185074b6c61b0f615a355fffca0a1348a53d142a19636e90da25fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F61 17560 bytes