Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c74a29b6d6f84f5…

MALICIOUS

PDF

84.0 KB Created: 2021-09-12 06:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7abf70a5071c752a5608e55e545d6943 SHA-1: 5b35d0a6122570ab3f9d4f96ab3510140a1631d3 SHA-256: 5c74a29b6d6f84f584191d395f6ca9a7e732f087aaa27704d84100ab73d8401d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links to external websites, many hosted on disposable domains or compromised CMS uploads, suggesting a link farm designed to redirect users. The presence of a 'download button' lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://siam-royal-view.ru/data/files/wojoliwufage.pdf In PDF document text
    • https://oasis-travel.ro/files/tijonizoxutifiw.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/fijekoxobitabuxefadalexu.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/metimug.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/zitegek.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/kamotaneleripadijumuwu.pdfIn PDF document text
    • https://cyc-catering.pe/disac/userfiles/file/kofakam.pdfIn PDF document text
    • https://aynispirit.nl/userfiles/file/dazefuron.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/39932937412.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bomazejode.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/20886398117.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/ranofunot.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/3880200134.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/wosomolirugodipobavaf.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613181f0180c4---fetug.pdfIn PDF document text
    • https://mitrasuksesku.com/userfiles/file/wejatizozegadekagafonor.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/77001824264.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/06afcaeac29eaf1859553c1cdf6b66ca/tubajevimavajovopomiguju.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/35794528955.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/27194105956.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2b38005f0---labugi.pdfIn PDF document text
    • http://nguyenphat.com/public/default/ckeditor/files/bawuloruzewipukexugux.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf96d401b0---57987938844.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210901150351.pdfIn PDF document text
    • https://agrando.cz/files/file/tawexo.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4b0a16ff0---sadofeladek.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210906215552.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=shadow+battle+2+cheatsPDF 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_off0000e361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE361 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB73 17592 bytes
SHA-256: a0941c7291f1d8e7652252bb14726f7621a74333899f32f31dd2e4ec8e8273d5
font_02_sfnt_off00012983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12983 10592 bytes
SHA-256: f99a7eb8f1b30c86f6621286e123177b6416bd8c0324acb9906b4ce8ac9e82d3