Malicious PDF — malware analysis report

Static analysis result for SHA-256 3106a2b8191afb54…

MALICIOUS

PDF

86.2 KB Created: 2021-07-07 03:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 010b9d557d1fa504a654cc0c08e126d7 SHA-1: c8fe218786b3921340447f48c4dcb5928c80ac96 SHA-256: 3106a2b8191afb54ef3eb7332a7fd2f047c38e7ab4fca03f1efa10685a9b6b9b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://philabc.ru/uplcv?utm_term=zombies+2+full+movie+free+online
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/ef121edac19e21fb74623f4da47e3ed6/43992513043.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/0613df6c6bfc9c8307b6d64a8982b1fb/53749194568.pdf
    • http://canadanur.com/resimler/files/5741632440.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160781c7942605---17269234397.pdf
    • http://www.masozilina.sk/ckfinder/userfiles/files/20381131128.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/ie7ekmf9vao4718afs9cujb98q/28902602689.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c753b97d0---16690266529.pdf
    • https://hanurichurch.org/ckfinder/userfiles/files/lubexerakobitabetejanixu.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/774600f5b04d043d99cc17f763a33429/repazujil.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/704a9c8509621b413700b1c67936daac/gifuwabagonovofuvojo.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/b0d2266989d0052c7f8bf342450f9142/ribisak.pdf
    • http://simonide.org/userfiles/file/lezosiruzew.pdf
    • http://headrepublic.pl/images/files/talirax.pdf
    • http://uleshuzatshop.hu/files/file/livinobuvixe.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160aa6a760cc85---komusifosebun.pdf
    • https://onelineservice.it/file/mesinanutibibis.pdf
    • http://livingkaneohe.com/userimages/68771201010.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/4q3146bip7ricn54v4vrqcmkvb/7867826818.pdf
    • http://princeton1959.com/clients/863834/File/94781397044.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b0996917d---munuwunexamubun.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dde0787a31---dogipagax.pdf
    • https://weilaimachinery.com/userfiles/files/sigimaviwatakaxozapega.pdf
    • http://iltorg.ru/upload/file/susitolinene.pdf
    • https://agronlogistics.com/userfiles/files/mukidixo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off0000eea0.bin
185ae44b5b45c5b4b9c522e3ea02e96c59aa3e45797d5a9436b37ac75f955df1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA0 17388 bytes
font_01_sfnt_off00011b9d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9D 16792 bytes
font_02_sfnt_off000133b4.bin
73d0e0c56a0f1b96bc0264d5b0b39ef21c61102669a54d25648d999c931f1c39
pdf-font-stream PDF embedded font (sfnt) at offset 0x133B4 10504 bytes