Malicious PDF — malware analysis report

Static analysis result for SHA-256 014d24b9a071873a…

MALICIOUS

PDF

90.4 KB Created: 2021-07-13 22:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 611680f75af8910beea2d5e6c86a2d23 SHA-1: 70595e06a2d09f8dc44f43d0ddf677172d8adc1a SHA-256: 014d24b9a071873ab76a5d4c36fa69631b207e0a0d9abc7c2bb6a4f6f45c316f
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV heuristics strongly indicate this PDF is malicious, specifically a phishing or trojan variant. The document contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading malware or visiting phishing sites. The presence of numerous distinct hosts and the use of 'utm_term' parameters suggest a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://hphs1958reunion.com/clients/47465/File/daxegukerukudejezazene.pdf In PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/bazikexeji.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16092f25a7f1c3---vulamiremub.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/kusidakejafopike.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f8397af68---pavekiluli.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c02919fb4---kosekonalinaz.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc0a3c0d89---22375364373.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/2hoimr076qsss1l8i57io3s7e3/jebezoxesu.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607c46c3d7bcc---gunewiposeminararonewa.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/74028a666d5edfe6cfdc6e2fcae000ad/77680248783.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/e78b0ttvdo383uk5k49a1urg9c/riratubivudunanidoju.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/ea083d4989629c280c4bcf5e5e1d245c/nanopubapuvoz.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c012485c8e3---49024846692.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/02ebbf1ad40621c99904c266bfe7787f/54006666069.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/87914467299.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/difetisezunimaku.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/96706784073.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa965b6fc8---pepadori.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/posekawefa.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/dodixajuxokagokov.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce9861f36f---53327561778.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160806a09b8e67---64914289329.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=mobdro+download+android+boxPDF 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_off000101c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000119d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D4 17028 bytes
SHA-256: 68b1d9333332330b7abce4270dbc0ee75671aad8b5a4c0fe30e0ea96d22a8247
font_02_sfnt_off000145f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145F8 10164 bytes
SHA-256: 0708d074a499c5e2b5924f01e33c636d04215662687c7921f7e065d6bf9f26a3

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