Malicious PDF — malware analysis report

Static analysis result for SHA-256 929562a70c73a041…

MALICIOUS

PDF

70.0 KB Created: 2021-09-29 10:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9991ebefcba1746c7146cf7e91a4b393 SHA-1: 5138fb28f8dd6eda7c617e1ad4ba2f144645475b SHA-256: 929562a70c73a041e582997a07c428f3e2a275014fb9671c4a95f3748d6136dd
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. The PDF contains numerous embedded URLs that point to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of multiple external URIs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://laborke.ru/uplcv?utm_term=three+steps+above+heaven+english+subtitles+download PDF link annotation
    • http://mofrantech.com/userfiles/file/96088218646.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/risifakixijikutuxekevafof.pdfIn PDF document text
    • http://ktcz.eu/files/files/xaturinamizezowufidofef.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/sixinomuxuvafi.pdfIn PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/gurupufagefurugeru.pdfIn PDF document text
    • http://finadev-groupe.com/userfiles/file/13114553711.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/kafatiganibo.pdfIn PDF document text
    • http://condominiobrisasdelnorte.com/userfiles/file/nozojusazigoxikozuk.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/ebfb2f13d3ddd378852a63b6c84fb18d/76694915794.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/zoparulafonimiwomavekevo.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/21069481383.pdfIn PDF document text
    • https://aspirecambodia-edu.org/userfiles/file/gotufilogefajonoguj.pdfIn PDF document text
    • https://amgaa.org/temp/files/38817215544.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/jomuvixemipebexadavodelo.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/welazaruvujuzarinejenoweb.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/jeq4nlfgr852180r7277hfs025/jokebigenibira.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/44198285904.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/vomologupemefezaz.pdfIn PDF document text
    • http://master-vin.ru/files/file/61743673860.pdfIn PDF document text
    • http://srtprogetti.eu/userfiles/files/56780956548.pdfIn PDF document text
    • http://jjburgerut.com/uploads/files/11006297429.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/wisamafi.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/d5649dcd6cb2bc11610b12f9d6415362/52246737704.pdfIn PDF document text
    • http://chinahongji.com/d/files/jijidazazinigulusat.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/savexerubis.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_off0000b444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB444 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5B 11028 bytes
SHA-256: fe5808dd4a21cbd1db477337bb66af7ac40420af1472b030a203a46873dd1fa0
font_02_sfnt_off0000e58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58C 14556 bytes
SHA-256: 5e2b036105aacfd1845c9ca60c45e983abee89708132bd6be7291e9a8d644dae

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