Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9674ed8fc0182a…

MALICIOUS

PDF

94.5 KB Created: 2021-09-21 06:34:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 8e8002e52fe6637ae79abcdbc5a4365d SHA-1: c80b780b287b1cf1318627ac4b451e76783a9c38 SHA-256: 7f9674ed8fc0182a9b5c9cb00b6ec52a0bee13492570c53e1cc7b45810ba8885
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, exhibiting characteristics of a password-protected archive lure. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a distribution network for malicious content. The presence of embedded URLs and the overall structure indicate an attempt to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pixomot.ru/uplcv?utm_term=winning+eleven+12+pc+download PDF link annotation
    • http://anhbanglaw.com/userfiles/file/3654722535.pdfIn PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/nokav.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/4629478755.pdfIn PDF document text
    • https://el-tall.pl/pics/file/56867659826.pdfIn PDF document text
    • https://hiroyoung.com/data/files/timoxilopa.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/47266627171.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/44500621843.pdfIn PDF document text
    • https://hiroyoung.com/data/files/76154169022.pdfIn PDF document text
    • http://lidaoxc.com/upload/files/gaselimefatobu.pdfIn PDF document text
    • https://oceanflowerhotel.com/uploads/image/files/34280002179.pdfIn PDF document text
    • http://southerncross-ex.com/images/blog/file/22298170405.pdfIn PDF document text
    • http://mawratanews.com/armedia/uploads/files/zoduroroxotepujelipexuw.pdfIn PDF document text
    • https://prevodi-plovdiv.com/userfiles/file/nexugalebokilasofed.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/zosudewisimaxenuse.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210904163078761061.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/15f876d7cc6014100e709497015e004a/nadav.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/titegize.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16132bc8486de8---11576680171.pdfIn PDF document text
    • http://dywin.com/uploadfile/files/fupipufu.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/ec7ee9b1ef2029486ec768dfaef1fe94/25269561761.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/rozotasexama.pdfIn PDF document text
    • https://leciv.fr/uploads/FCK_files/file/xujadebipen.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/digofelifob.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee699e5810---watupotokovapet.pdfIn PDF document text
    • http://eltprof.ru/userfiles/file/71371512141.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_off00010b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12354 18588 bytes
SHA-256: 0947f4a85ca24ac3df9e61b06903c3598c04126d0c72df4873ca18b9518b3635
font_02_sfnt_off000153bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153BC 10640 bytes
SHA-256: 8162132e1663d9164a872d616f8706b13603f322fb9afce6ef376c7ef2dd77b4

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