Malicious PDF — malware analysis report

Static analysis result for SHA-256 449993df1daf4a8b…

MALICIOUS

PDF

81.0 KB Created: 2021-06-17 20:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 517c392ed4a0895f979058feecab0ee9 SHA-1: f7d636483647f7895eff1fd219bfe89e9326aebe SHA-256: 449993df1daf4a8b0457e4b4fd22dca810a92323c5a089c396e766b8e97addbd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or distribution point for malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://allytemp.ru/uplcv?utm_term=gujarati+bhakti+ringtone+download PDF link annotation
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/fkkac1hbm86nvj7st06mrr2nam/28966292191.pdfIn PDF document text
    • http://ideas4mypool.com/userfiles/file/mibutuxidoverabalan.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/pudowevinivakevoxit.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/81230927014.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609affd627cb8---dupazowunizewevamoxawope.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/11eef3f91175b534ce65484670969bb3/tibalojilazunaxu.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/f3b0168f36a540128e411798b0239178/xalam.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/5csr4kbkui76dgqjdo4c92b1k6/vupafa.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/54093558753.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160781abe68ec6---15552263095.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/18644739267.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b18a4e9a10c---redinajaterefop.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/f27a4855a8b59afd354b434578c34379/waviloxipitugi.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cbf7536d9---88151573229.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/61356543074.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aae4a12f491---86213492828.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210529204632189.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14C 5312 bytes
SHA-256: 59dcb806d1341012a20a9a1ba2e4777e20f2fad4a583cd615eb2b7695b81a708
font_01_sfnt_off0000e361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE361 2024 bytes
SHA-256: a511fb262e2f240b0cc62b800179189f1c69c7b4d67d938f9bc0c5e12ef74554
font_02_sfnt_off0000ecf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF6 11132 bytes
SHA-256: 046a24045eb680604c8045616d12c0e83213aa99a84204ac2fe92e5637ebebe8
font_03_sfnt_off000112fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FC 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_04_sfnt_off00012866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12866 3388 bytes
SHA-256: 7680b9bb2caf2e5b93057a34f3b8e35981a1480fd319f0b91c74a743cdcbb70f

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