Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e586cd97218e4bd…

MALICIOUS

PDF

70.6 KB Created: 2021-09-25 07:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0137e4f82779a0b2785b01228072e351 SHA-1: f2e118336ed6f8822073c3e69ef7175789e3acc1 SHA-256: 0e586cd97218e4bd8e8a66ea1b5ac8a43165a7f47855c1662efa3fd4bda633e8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The PDF contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards an attack pattern involving directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://smingames.com/ckfinder/files/xaxeraxonegiwuzaj.pdf In PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xunilulunanadisitopirared.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff62ced44c---41973125566.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/72547763168.pdfIn PDF document text
    • http://skisun.it/userfiles/files/15015608556.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1631062853.pdfIn PDF document text
    • https://ku4ysk-9lgp4y.com/contents/files/widapemujutujebo.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/45851403990.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/39907328457.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/lonasegixe.pdfIn PDF document text
    • http://artpolyclinic.com/file/files/zoroxiditerefelol.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/98534344848.pdfIn PDF document text
    • http://toonesk.com/upload/lonidezexumerukekunetipe.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/fenatifujigunupazoden.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16143efd182b69---rarakopuzuzep.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210901210534350.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/68093536444.pdfIn PDF document text
    • http://choragwica.pl/userfiles/file/21559012515.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/wegejakije.pdfIn PDF document text
    • http://xn----7sbabjlebzbdsbxti2bw3r.xn--p1ai/files/files/vagadux.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/pexumekisa.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/79283713850.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/63362326118.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=sum+of+infinite+ap+formulaPDF link annotation
    • 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_off0000b03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB03E 10524 bytes
SHA-256: 4555f2aeb5065de85289c288c2288e4c92f03c78383966cfec2811a55f7edaac
font_01_sfnt_off0000c82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03F 17580 bytes
SHA-256: 738b31d6d58ad4f75e0761b042201412594514069e124b2b47b9084f13485eaf

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