Malicious PDF — malware analysis report

Static analysis result for SHA-256 063c3b0016867c12…

MALICIOUS

PDF

97.5 KB Created: 2021-08-07 14:03:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5b48f60522f42ad626a5fdc90a224fa9 SHA-1: a6aed1c2f3ab37be7ebbd4978b4546e4ed0a2f62 SHA-256: 063c3b0016867c127b77fd085cc1341ba05d7694cdaf36091e7f2b2762980af5
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of multiple PDF link farm heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b059151c6d5---sadufixojeliwevepegu.pdf In PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca2a31cdf1f---tivirirukigovof.pdfIn PDF document text
    • http://boschvietnam.vn/files/usersfiles/files/migomelogatolafilirad.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/18489293526089b40813899.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b94ea292c11---ginepomig.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/d5d6c43ad4f689610988998fd037f02f/kojuzedogasufese.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/acudibs7cmm1hcuqnkcf1mdgg4/59778332948.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/df09301e910ecd8a155bb39a664e356a/bapaboserase.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/tesaxivumamudafedipesod.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/6ee26e31d4f467e2a43552e9209cf56f/98034392581.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108a07483f73---60176179621.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/surulininufetofovikufelot.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/95446840890.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/5039624134.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/86711901239.pdfIn PDF document text
    • http://williamshudson.org/clients/3/35/35bf74ce48b5c120232fd40fb4fe3e45/File/magezivoziposor.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/giwinera.pdfIn PDF document text
    • http://zubrcup.by/files/files/37641741138.pdfIn PDF document text
    • https://12waktu.com/contents//files/jinusofad.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/zaduwoza.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/rurumijes.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/b315d955f6642925461f8d4f6aec5966/31605422139.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/30014633615.pdfIn PDF document text
    • https://drosamahetta.com/userfiles/file/vefuga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=what+is+the+most+expensive+jim+beamPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/34648640726.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_off000114d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D4 18864 bytes
SHA-256: 0a0f3a206fab931bcd17192e29344a933a16df8c236c6ea2956df172774976ba
font_01_sfnt_off00014636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14636 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E4D 10800 bytes
SHA-256: 9ddec7cfe186669969126519b3eeb8c3f68e9a5500491e2cd16c38164830eb28

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