Malicious PDF — malware analysis report

Static analysis result for SHA-256 84417a6604456cd6…

MALICIOUS

PDF

73.4 KB Created: 2021-09-05 16:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3fb1491650820b07c2b0b32414cbd03d SHA-1: 07331f69c918a0a7bef726f16b236f97f65d3b87 SHA-256: 84417a6604456cd68431380e1139543ade62b7d211c0e13d4fa4b9efdc5473d3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains embedded JavaScript, likely used to redirect users to malicious websites, as suggested by the numerous external URIs pointing to potentially compromised or disposable hosting. The document body is unreadable, but the heuristics and URLs strongly suggest a phishing or malware lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • 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.
  • 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://global-insurance-broker.de/downloads/63130546138.pdf In PDF document text
    • http://bluekeydigital.com/images/pic/file/dezasosedola.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/93844123827.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021081215595473499.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/70636768050.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/8af3e5f413987b8f8e64225898099370/duviwinowuvage.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607864bbc235b---368189112.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608053763c93f---fimoduloje.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/94764493222.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/sevupbtrm7ciaauih5v0en8v01/91326339189.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f701907dfe---64314665995.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/xawulofakokojemukedirolu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f27f10ee0df---sinusuwuwemodafewudu.pdfIn PDF document text
    • http://psychoterapia-przemysl.net/img/userfiles/file/nexipuliwilimipepobow.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/kifaguwineforadutafabuwir.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/60647231076.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/tedopoleren.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/witojegozivapa.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/1h7i4hr9p6i477ambhkfdglqa2/vafugepeje.pdfIn PDF document text
    • http://koala-al.com/d/files/mirozaniruvumovoxowuzem.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/gusinuguwamenote.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/unvsqt6hi4bi5aok6o3gntlb33ffvco8/lumumijo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=project+management+techniques+rory+burke+pdfPDF 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_off0000bd1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD1D 11744 bytes
SHA-256: d3a5bcf80cf734f79bcc1a958f57b23f75c65623181d03c0b040368e14b70287
font_01_sfnt_off0000d83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04D 15640 bytes
SHA-256: 3f76893c1d0f67c1e32469098b14454ee4282eb681e234f0376f91acfa46aa6f

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