Malicious PDF — malware analysis report

Static analysis result for SHA-256 00afe8676c70cc34…

MALICIOUS

PDF

79.2 KB Created: 2021-09-18 03:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9a0017950c2e4685fc8b2ddf157deb1c SHA-1: 766c1c19853c4225986da4639a8ceb440e3c5355 SHA-256: 00afe8676c70cc34ef2c93dadfbed6666e5b9be7f7405a1c8b3bb41f3fd8d670
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and multiple URLs pointing to potentially malicious content, including a link farm hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a second-stage payload or phish the user. The presence of embedded JavaScript suggests an attempt to exploit vulnerabilities or execute malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://pixomot.ru/uplcv?utm_term=diamond+rush+mod+apk+android+1 PDF link annotation
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614009f37b144---dadufiziwabexokudisi.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/kunudomoju.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/ruruvozobozelevefak.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/86303680894.pdfIn PDF document text
    • http://zygzak.eu/foto_dane/wysiwyg/File/35774116556.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/71888211080.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/kapikuduwusigop.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/56693661894.pdfPDF link annotation
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jumigemibuned.pdfIn PDF document text
    • http://pmrs.ps/userfiles/file/18349893916.pdfIn PDF document text
    • http://sualpturizm.com/userfiles/file/wevul.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ecf2e7fd20---49200850211.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/pemunelos.pdfIn PDF document text
    • http://nhasachthunam.com/upload/files/xesurowiruwediga.pdfIn PDF document text
    • https://relaxbotanika.cz/ckfinder/userfiles/files/muzobupikotibadinupogo.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/xesaganogaxelibu.pdfIn PDF document text
    • http://avvolodin.ru/upload/file/58513479608.pdfIn PDF document text
    • http://allineers.morefriendship.com/upload/files/bimufosu.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/b2b9fd5ff3700c13e208bc8259ea38d0/1969759420.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/533765eb546969b5358ec08db49bcd54/zinosorajaralopugunobu.pdfIn PDF document text
    • 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_off0000d203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD203 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA15 17592 bytes
SHA-256: 38a049244db28812dab7776f01ac4397be13c35276ea3b10fdc5b853908a7244
font_02_sfnt_off00011749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11749 10628 bytes
SHA-256: 773a59b29ec301b14dfa0c5826d5ba58b255bd8c709e651028ed219f7528eddc

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