Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2eb1cae8ffe19ef…

MALICIOUS

PDF

80.3 KB Created: 2021-07-20 02:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 48103e90a03372ac4de22a4559fb5144 SHA-1: 189704fb6ec0f0357c300f3a02d387d6d1079cba SHA-256: e2eb1cae8ffe19efffc0a29413bc5b146a4189ca1ae167683be3ec041def951d
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content. The primary attack pattern involves leveraging these links to potentially deliver phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/b408b94b11cea14a94fbd885a6ca665d/59234592184.pdf In PDF document text
    • https://bititechnika.com/uploads/file/7239532473.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/kebimufagiweneganorunu.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/b4b5b43af09cd02f597168c098a0fa5b/55575839843.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/31735585144.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/45728525320.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8932f13da27e8541371a20c8e2a778a4/pawezigofodit.pdfIn PDF document text
    • https://mintowncoffee.net/uploads/images/files/gofajinimejuzimomowasil.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/rulezi.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a290f9048a7---xonapubedol.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/sodosukijimexeban.pdfIn PDF document text
    • http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/74761908314.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/95179516544.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/kurewijinopu.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/88691718942.pdfIn PDF document text
    • http://schnauzermountainminiatures.com/clients/17729/File/forovagosopuxekadanaza.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160790a2b0940d---80583277767.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/76587209706.pdfIn PDF document text
    • http://targdenunti.ro/userfiles/file/36290980026.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/tumijaraverepu.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/sekuvinuzulunoror.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210712_0BB45CF31312DFE3.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/58798735792.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/brtqu7tfudrjdv833eiqk79hfn/zipaxujetokuwiwaxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=initial+r+words+speech+therapyPDF 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_off0000d77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77B 16696 bytes
SHA-256: 76592d4a313c99342b50c3669d0c295937c5eb38ed5645f68779f420a7f233d1
font_01_sfnt_off00010300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10300 10764 bytes
SHA-256: e4836a7830f8f9bfda055a702d6a77bb2e01904ea34ae8e7c23df34e363f3f48
font_02_sfnt_off00011bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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