Malicious PDF — malware analysis report

Static analysis result for SHA-256 c085b9b1ce234a32…

MALICIOUS

PDF

86.2 KB Created: 2021-08-12 15:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 65b4010576b422356ff5f4f13cfad00c SHA-1: 8565b808bc5de35fb2ee57c2ed8b23b50aa42abe SHA-256: c085b9b1ce234a32426be9188ff19cf9f746b6ed7f43e9100277f7c14738cedf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains embedded JavaScript and a link farm pointing to multiple disposable domains, likely intended to distribute further malware or redirect users to malicious sites. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://amy-tsai.com/images_express/userfiles/files/22500179687.pdf In PDF document text
    • http://dbhsreunion.com/clients/21010/File/6670728253.pdfIn PDF document text
    • https://guenangequitation.fr/www/site/js/ckfinder/userfiles/files/kebesokavizirexumubitaga.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/potigimunefakuxere.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/86e406504e129a413a1a6759b7f922c6/wavebipanozila.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/bekenumolal.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/zugututorumipofumoke.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083aa13ae1c3---14240209865.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f333d874f---91313813357.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/a5d0a1fc17c484b2798877565fc1afa6/25721164039.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/febononapamibovaguv.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lonufetefininusot.pdfIn PDF document text
    • http://robinsonsmithreunion.com/clients/879094/File/72112819180.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e669b37a5e---panobomowafifuwetefo.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/jivuzixanabazoluzujazub.pdfIn PDF document text
    • http://deltools.com/userfiles/file/dufabujedumunudumagaze.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a4cb5984f---xizatutajunidase.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/tudegase.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d527b57674---tukojumezimegemotaput.pdfIn PDF document text
    • http://fitviewer.biz/files/file/90211332708.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/50187074331.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/47e38910b1cbe3ce8b4e55edb96a26c3/58420736285.pdfIn PDF document text
    • http://7tec.ru/userfiles/files/nejimojuvovagozepuda.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b939363316---14468416457.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+hack+one+piece+bounty+rushPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDA 10948 bytes
SHA-256: b53cb881743bdf58084f887b9db5367c0b7b1efe9157cca0b5f7822b62d8e7b1
font_02_sfnt_off00011504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11504 1692 bytes
SHA-256: 6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13
font_03_sfnt_off00011d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D08 17220 bytes
SHA-256: 88d3f6017a6a04740c6e5cb3cdd05385b00feaa623cf6c2627aef193a839feab

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