Malicious PDF — malware analysis report

Static analysis result for SHA-256 8201a96f5951ee56…

MALICIOUS

PDF

78.9 KB Created: 2021-06-28 07:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e71b28b854c290023bf3a2efffe06047 SHA-1: 3cc37c5ec60754672af30881bd13556784649f5d SHA-256: 8201a96f5951ee56f2340d84efccea7fbbefc059b090fdeb52618b66ff7a5680
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary purpose seems to be directing users to external, potentially harmful content, masquerading as legitimate downloads or information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6674

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://agro-pasz.pl/ckfinder/userfiles/files/67488254192.pdf In PDF document text
    • http://anthonyvienna.com/sites/default/files/file/jutebunidi.pdfIn PDF document text
    • http://hkt-optics.com/hkt/images/userfiles/file/radakubejewobi.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89260067845.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c0a00e087---sirubav.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1f7067675---bisasovo.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/xazulix.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/629d01669c9971bddf9b4ab286575764/79205828335.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608521d9e9b19---95052210848.pdfIn PDF document text
    • http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/zopurajunoguvoxejos.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/fuvivusanujiwekaposi.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/tcosq7vk5r6hmo1tqfkfv93vu7/66221073291.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/nm2rd2k3c2bfc25au20nns0tvl/48104301348.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/gaxukizulasepadojutonuwuj.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/60475485934.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071466a72e39---mafexuvalevijukaj.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/cffd9fad4ae70169cf39f28daf3b5f0f/57916756638.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd38fbed267---92292379328.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/bukanasod.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/ccbqqic1e6a99jtu84qb524d4h/gaxinuraletuvorasisil.pdfIn PDF document text
    • http://funperm.ru/content/file/99020532701.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/nazut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=mp3+cool+download+musicPDF link annotation
    • 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_off0000db52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB52 10696 bytes
SHA-256: 48ed7265089477e3c3733f9ae0c63b49b60cd3cd5f922a977a7918995f7f76e1
font_01_sfnt_off0000f3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E4 17816 bytes
SHA-256: 2be1757e81fdbb75d9cebefcb01b90cba645b8056f2308672a9bf046a377f430
font_02_sfnt_off000122ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1