Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea09c1be97d39b52…

MALICIOUS

PDF

82.4 KB Created: 2021-09-07 05:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a525d7f6a83eb000b76ffcf5571d8880 SHA-1: 2697367c84f9d677f5b69ce5d83764621a4aaa2f SHA-256: ea09c1be97d39b52e4bc44f2c334a4bd49bd202edbba074d4f9bab4ba76bfd74
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous external URLs were extracted, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are consistent with a spearphishing attachment designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://allytemp.ru/uplcv?utm_term=world+bank+2018+pdf PDF link annotation
    • http://topoint.cc/userfiles/fckFile/20210714123047.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/vodarufadetabasoror.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/2e5aab75b1e58735f5a866579e7c31d6/33329257282.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/e2cc662b10ef7e072b70c07d6efb634f/tavowafemulisapudujamip.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/gagokunaxa.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/matidetoji.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210901004822947889nbaow2.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611937219751a---zugope.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/gofedesemufevimogo.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b25977cb7fe---lometujolemunogisarez.pdfIn PDF document text
    • https://angkagenap.com/contents/files/87617262101.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b018af651---27815277946.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/relabi.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/44495851200.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c950cc6d75---34889986127.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/lotixiziwuvunebova.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/30176948125.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f42d199fa9---bigiresatejozibaj.pdfIn PDF document text
    • https://pilisilovaskert.hu/ckfinder/userfiles/files/xoterawibexewiredetotefo.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/679331017.pdfIn PDF document text
    • http://jump360.co/upload/files/20210611121525.pdfIn PDF document text
    • http://sromedical.com/file_media/file_image/file/zezekasaforixegudemo.pdfIn PDF document text
    • https://adikkedua.com/contents//files/pivike.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/bulvqji8rmesmiap6ovtaau2uu/fabeposek.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_off0000d94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94E 19552 bytes
SHA-256: e73509f1f5438c00291b548a1868e47100eaa4003a2a69d3ff2674abdff5caac
font_01_sfnt_off00010b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AE 10728 bytes
SHA-256: 032036fd4db1d3f2ccd03a8bbc7f447288172850306f6718ca20a1f0137eb681

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