Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa10d132deb6c94d…

MALICIOUS

PDF

67.9 KB Created: 2021-06-10 05:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 03a9e166f207d33d8b645c1e6d19310a SHA-1: 2e3cde274b733e1c8f32b1bd2b559422c1db04c2 SHA-256: aa10d132deb6c94d93e194248330362ee1ce966ca74c69d7bc4b6aeff6b5f224
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, contains references to 'cracked minecraft account list' and numerous URLs hosted on compromised or disposable domains, suggesting a lure to download further malicious content. The presence of multiple external URIs and link farms points towards an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9719

Heuristics 5

  • 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
  • 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://medvor.ru/uplcv?utm_term=cracked+minecraft+account+list PDF link annotation
    • http://danburyhighclassof1961.com/clients/b/b4/b42d7d7907ff1a67dd6fd366dd3c6775/File/56777615539.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/sumejovajafefepumem.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806b2958afa---56768982261.pdfIn PDF document text
    • http://crediramasrl.it/public/file/xaraxijilamevuvaxinuj.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/e1103aa939ba04c7e6fce103c29d2fb4/pogemazaveremimesigofuri.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/wupulov.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/10502900174.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/8f4e8a04619d7b765c5bbcd91ceb7707/xoxipajorefogipatubifo.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/lepekagitakoxofelidununif.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/kp9ord39fj58id606n3mli99d2/nusuronapuneb.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/0df09bcf8515f011dbd299c95176be93/6397491156.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7abb5c3e1---18324579640.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f1245baf4---25486993231.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/deduvibikixav.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/a7ulkb2ssogm9i5o3kuldo4s64/78692421069.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60B 5136 bytes
SHA-256: 584e42534d225fb3a8be550e53026cfa0f334e17962fb3082b7229b0c4ca65fa

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