Malicious PDF — malware analysis report

Static analysis result for SHA-256 f986dcb2e58bf679…

MALICIOUS

PDF

87.8 KB Created: 2021-07-30 11:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: f02f0280cb175af0f927d3f7935fd56f SHA-1: fff92120d3d4fa8e39f38e6a47faae523e8cdb6e SHA-256: f986dcb2e58bf67971d01bd60c4f098fe0c30cb30cef1228ad7163d7cf9e3933
172 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external links, some pointing to compromised WordPress upload storage, indicating a likely attempt to distribute malware or phish for credentials. The presence of a visual download button further supports a malicious intent to trick the user into downloading a payload. ClamAV detection confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://infoegrafica.com/userfiles/files/13236019786.pdf In PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/66419120073.pdfIn PDF document text
    • http://chronicles.ae/userfiles/files/75571986331.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/mapolilaremivaburi.pdfIn PDF document text
    • http://hubbardfamilycircle.com/clients/62940/File/5967756419.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/tiganujima.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/42587210446.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/7gohv8k58apatnr3e03h2t5cu8/denasijuxusa.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/67094308228.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/66376233081.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3f8595811---sukedeke.pdfIn PDF document text
    • http://tuning-zone.eu/userfiles/file/48674699233.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/ipds5ui50a7ilup8d3rbcqrqi2/70080777428.pdfIn PDF document text
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/saduluxelexesamobo.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/teledegusoxup.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/14811655827.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/94680827740.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/cb08049305e021d363bea5944f05c498/zemexumijilal.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/kapiw.pdfIn PDF document text
    • https://dock-levellers.com/upload/files/kafini.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/zagibemezegak.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078e90073fc3---70973851438.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3c7f452e5d---60631480596.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/62943641274.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=pokemon+emerald+kaizo+zip+file+downloadPDF 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_off0000effd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10814 10632 bytes
SHA-256: 39b22772f01b7d105fbb46f405d4334b52b1bb3cbd02b45cd0aab0cc1aed2fc6
font_02_sfnt_off00012061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12061 18760 bytes
SHA-256: 36da31e565866ada4c9a41151898c055bcd2cf96c8741ddc964cc348f323535a

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