Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce0d60836bd9626…

MALICIOUS

PDF

80.8 KB Created: 2021-09-17 16:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aa93a69aaba2e106911713933def541f SHA-1: 07bca6636843a723ef53984c88d1886876f88a07 SHA-256: 4ce0d60836bd9626cd335232faaf59cf474a282027e0c09aa62545e6108e1170
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of a download button lure further supports a phishing or malware distribution scenario.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • 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.
  • 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.
  • 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://archism.ru/uplcv?utm_term=av+voice+changer+for+android PDF link annotation
    • http://mackyz7automotive.com/js/upload/files/21928328629.pdfIn PDF document text
    • http://dichvumucin.com/upload/ckupload/files/raroduzodijigujo.pdfIn PDF document text
    • https://andrejc.si/files/file/99387120692.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/c59568e3acc7ae9bf8fe64ffb21e28a5/nefigovisetoru.pdfIn PDF document text
    • https://kapefashion.com/files/files/7351938952.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/67986355695.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2dbb0351e---34865528420.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/virujiverogiwobugerojija.pdfIn PDF document text
    • http://nprofit.hk/userfiles/gidenalid.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/katusenejazalun.pdfIn PDF document text
    • http://covina.crazyrockinsushi.com/uploads/files/67563084092.pdfIn PDF document text
    • http://iact2001.com/userData/board/file/xeniwukitujefunijetib.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613792667ec56---wefomuwidobemosa.pdfIn PDF document text
    • https://regiefranchet.fr/userfiles/files/80627884980.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021091419032173.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/jonikibosag.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/petovunavej.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/38190348728.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/38580129061.pdfIn PDF document text
    • http://yejiya.com/userfiles/file/naxiwuxagevog.pdfIn PDF document text
    • https://www.agcontraincendios.es/ckfinder/userfiles/files/29452526234.pdfIn PDF document text
    • http://medeeatour.ro/mm/file/42039902011.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/vuroji.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16136f9e43fb32---68506270615.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_off0000d724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD724 10488 bytes
SHA-256: fdf81c78fc6ad10f151f6a1917094a913e481482e93d4e9abea292ab830bc4c8
font_01_sfnt_off0000eeba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBA 17960 bytes
SHA-256: 43c23c341275810b722a7756ce64daf9222177a029f36d6591283eb30f91185a
font_02_sfnt_off00011d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.