Malicious PDF — malware analysis report

Static analysis result for SHA-256 7347de06aeca473f…

MALICIOUS

PDF

77.0 KB Created: 2021-09-03 07:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c31cb05a146f8d5223fd6163d20f7ec0 SHA-1: a8c8d54a772c55211bc9ed416d155dd29acc6ae7 SHA-256: 7347de06aeca473f03b5393d92ea13f3289b21f834afa0cdfe2fe61f2fbc9247
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further support this, indicating an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfa3095856---91063114967.pdf In PDF document text
    • http://feuerwehrobrigheim.de/upload/files/fopor.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/dujorogolaxojaguzem.pdfIn PDF document text
    • http://zuche0551.com/upload/file/nofilafidakut.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/74792212439.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/sodozomi.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/jemoxeriref.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/32402879263.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/7c148b9ca277828c1773210bd8588450/wemofaxebikefet.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/sibujoni.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/salevuxomuvosowubuwebatoz.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad899f40495---mofugovijozo.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/v8ocvt7vurc63a3f5f13t7svo5/175953296.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/fozotat.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/0e106b93b119997acb5d90e17c90fb01/7459164603.pdfIn PDF document text
    • http://fantacyhandicraft.com/userfiles/file/medupenekijipunivizoni.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/82725604446.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/k6mqdggupckd41t1f7vhbe7r54/17177144747.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a3be08e7c---xudib.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b29a9d92e60---53751972422.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/668530af4c956a624d307eb077722949/wugedegabijusodonadutiwa.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/24182444936.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/gifaxogiwavalifutikepoz.pdfIn PDF document text
    • https://035620126.tw/upload/greenkitchen/files/94077860567.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=printen+pdf+bestandPDF link annotation
    • 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_off0000c985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC985 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE197 17500 bytes
SHA-256: dd10c73e0dc64155559734481e2b7d1670eda08511d05e1ace1975635f9ae3df
font_02_sfnt_off00010ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE2 10468 bytes
SHA-256: fe89d5771f629bb2d3e08cbaafc9516104d95c7840d78762a1b86f9ff3cd4e53

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