Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58b34a100e47b6a…

MALICIOUS

PDF

81.7 KB Created: 2021-09-05 08:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c0f8dcdd2b74450599a7b5f671076ece SHA-1: a7770823e711b66f95d0949941e95c8ec6e87fd7 SHA-256: d58b34a100e47b6a69300bb9a338b7378bc6ae460eddffad2fc61e665685ecee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of these links, combined with the PDF structure, points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://smidgel.ru/uplcv?utm_term=durable+power+of+attorney+ohio+pdf PDF link annotation
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f3d516e75---netivifibudegofo.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2jvcsmfmassbnrk2vuvq3g0vs2/xarariveronegemazobajerig.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/lesunovezet.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/34cdb43084d1e68dc4293493021d97b0/rarokabikakadit.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/kuxaxitikepazole.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b440d9e6c69---93312231678.pdfIn PDF document text
    • http://simpelms.nl/userfiles/files/66513265353.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dee620a52d---50472600247.pdfIn PDF document text
    • http://trhs64.com/clients/c/cf/cfad56e582d93fa9eda51f2516e23bdb/File/25461278343.pdfIn PDF document text
    • http://bctlorraine.org//userfiles/file/mirorotuwigam.pdfIn PDF document text
    • http://artospace.com/pics/file/14659049087.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6b87126ee760039a9f08e9f37b5be850/zazogadelofojujijap.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16089c22bd877f---31778640640.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/71549237c257e55c95cfa4e0db9685a2/nujidatudozamawojusopewe.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/jilarebuligudenevopavufi.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/58626826575.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/9320128076.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c32a8dc268---fesimukejolowuxemaku.pdfIn PDF document text
    • https://pre-www.bridge-academy.com/uploaded/ckeditor/files/womotevisovupe.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947b60c3ea2---25404762639.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59e692a689---fevoxupegawupajuxoka.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73c1bea046---lubijadaf.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/37390051307.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/pudapilomimegosefaxawoga.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_off0000da63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA63 17748 bytes
SHA-256: 725d164295486e4b5ec74cc81ec323810f1feae85216b4f39df93d38dbd1d0e3
font_01_sfnt_off00010805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10805 10868 bytes
SHA-256: 3e14bb1bd8b48648e2d52eeee521731413a36efc5126871a66db2f168b399a2e
font_02_sfnt_off000120e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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