Malicious PDF — malware analysis report

Static analysis result for SHA-256 694a9cca8322fcd4…

MALICIOUS

PDF

139.4 KB Created: 2021-06-28 03:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2805d6d102122997919f53022370f37b SHA-1: 29cef78d048ec8c2cd8407281f01d981e15c8033 SHA-256: 694a9cca8322fcd421b89ed9fa44a2951cb171ecd9c993c01dea566206871f5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://wastran.ru/uplcv?utm_term=sequence+of+events+in+a+narrative PDF link annotation
    • http://xinyuemu.net/assets/202106/files/20210617210119979390.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/86d053284122993e24a5f99adda3333a/vorefebipikoji.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc5d15f25cb---50015178171.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac288e4f12---58882003406.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/27459199948.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/809cd57b081add13cc5e9353181ea3ba/55017185047.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/gkpdgvtvmiuvebneq00ed6bee0/boxesezenipuf.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/98600270475.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/91136588347.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/1c5a4aae3f5cb4a04dea92bd089eb40b/lonenosidal.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ebf6f255b---zupevogozizof.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/kimom.pdfIn PDF document text
    • http://aweibel.com/Photo/file/73793906560.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd65184a48---xisutajizopubidomevarez.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/b2a5c4a5df2fbac8022f869371a42f8e/93284096699.pdfIn PDF document text
    • http://learningkey.org/userfiles/tibenujeke.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/774e4ea474fffddcd6378bbe6c7bd64e/wawiluwunanekuxutajoma.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/cb5bf8fbade0b6ca2f63844d3a6d5dec/degazuxodi.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdedc54ccec---xerabipafifile.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/72110366764.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160735f7c254de---tekalasudukapisaja.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/jgc3rbl0b6ibsedpgrj378oj35/mosidujekitebajivaj.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/96626981187.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_off0001be30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001d642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D642 18344 bytes
SHA-256: 7be6ceae8416a760423588f67b10dc708555812db8d00d85fce2bd9758207710
font_02_sfnt_off000205dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x205DC 10672 bytes
SHA-256: 84caf3297d17bac815fc5611a47d446e876b9c941ee14554bc2e4b512a7393ac

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