Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0dd89626326f13d…

MALICIOUS

PDF

83.3 KB Created: 2021-09-05 18:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ae78c621697a25eb21c073c843ff6a5b SHA-1: 7cc2e339746eede2fe93d994281ff82a12bdf745 SHA-256: e0dd89626326f13d25768798ec92a3dacd703154e114425a5e4bc72734fd4913
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting, likely to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple external URIs and link farm characteristics strongly suggests a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://crysiq.ru/uplcv?utm_term=bolna+hi+hai+book+pdf+free+download PDF link annotation
    • https://glbtrader.com/userfiles/file/1805430567.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/d5672b09d72e14dcaeefa66dd895cc18/mifezerolufaderuzegoze.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/mogopugoliritabefoxewe.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/97858288549.pdfIn PDF document text
    • http://daehnfeldt.com/userfiles/file/guluwofadaxinafuk.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/d6bfed6947a7cb3524f5f17917a72493/2187137673.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a07439d1033---tazejawerudumo.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b004789c675---sodogiwusenut.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/4b69ed881b5839b28fe2e7eccd0dfa15/gololilapokimomamoxevodu.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/a2b8538b4cfb6968c7d9b42bc5acbe23/sibarifaxipiwosubojefiwi.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdfb5de9bde---lewujaloxapijow.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/varafunese.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/74361540350.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/66145875246.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/79181873161.pdfIn PDF document text
    • https://ibextrail.com/editor-images/muxidaxorotetid.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be40332f193---76620532055.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/tolagezij.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/60aa4154263f93b335e099706208ab16/dezebuxanejitewozeri.pdfIn PDF document text
    • http://domainecomps.com/documents/files/gukege.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2c97733ed---225175108.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/62890398568.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_off0000d613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD613 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE25 22268 bytes
SHA-256: 27c546ea297c90676f349d8ec3f7a654ea8e291623bf2cffd03bcb7652347303
font_02_sfnt_off00012715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12715 10700 bytes
SHA-256: 1b912f98a7ab8d5ab78ce59de2bc723afc993bf5696d162ab04de90c7327005a

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