Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb069d5021803306…

MALICIOUS

PDF

88.8 KB Created: 2021-08-23 12:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a20c68774b0b48b05f1acc6ed647aebc SHA-1: a767751184d47a346f37d3370540b6d221578de6 SHA-256: cb069d5021803306564f58b8b6e67cf97c20a76e344a6824dfc2d12dd6a05dbe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to various websites, some of which are hosted on compromised WordPress installations. The primary URL, 'https://drafthe.ru/uplcv?utm_term=download+novel+fifty+shades+darker+as+told+by+christian+pdf', suggests a lure for popular content to entice downloads. No scripts were extracted, but the PDF structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5273

Heuristics 5

  • 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
  • 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://drafthe.ru/uplcv?utm_term=download+novel+fifty+shades+darker+as+told+by+christian+pdf PDF link annotation
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf2aaee8d65---lemamijonaju.pdfIn PDF document text
    • https://tajeer.co/userfiles/file/33069155526.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09cc3ce3d8---bavigiteroxofesasafojik.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e260e0555---murifewojapev.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/ditomomibuwusovofij.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1940a2861d---57964266915.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/41281578843.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607d479c66f97---gumiropizurar.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/sudobapuroko.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/6609247121.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/susawawigajopegekoxuzel.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/vejukuvoserukekakepe.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210731215854.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/tafunejukikidanoniwu.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/piredilefajegovalun.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/fubuxona.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210619_278E7F50FFDEDA14.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/4268282519.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/rotozujasibu.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160832b056255c---zivuj.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/jugitex.pdfIn PDF document text
    • https://bharatceramics.in/ckfinder/userfiles/files/60148036278.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11146 17080 bytes
SHA-256: fd9a00555deb792ab39d0ad2c305ade87b59e67d4f5c172d5b35d05e4c0244dc
font_01_sfnt_off00013e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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