Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2eea4131297c255…

MALICIOUS

PDF

79.4 KB Created: 2021-09-04 01:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2eb3cd8ca1aace0e38f884ff5f7ec472 SHA-1: 5e15570e252c9ead0bd0061e416ab49cfe01c398 SHA-256: b2eea4131297c2551dc8057acd851ff15a1411011c6b4bbe51ff7232410959d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's designed to lead users to malicious content or phishing sites. The presence of embedded URLs and the link farm nature of the document indicate a likely attempt to distribute malware or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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
  • 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://genegurumiraclehealer.comuserfiles/file/56982781507.pdf In PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6b3c464a6---vifilinuwolexata.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/1944d62819406f0b4840407b6c35144c/nijamelikide.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/8e3d4b957b7a064d49de532cf94b8c70/54413304293.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608770fd717bf---54268642922.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/adfd843c5ead3df49417167968ce0166/53813906901.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/1b48fa17196e47456b75f7518b181f9e/87479626156.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/d5skthg0ptapda7f5jb14ens2n/gubanavuxi.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d03ac5be3f8---xedol.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b522cbdc4---79812080043.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/fokuxife.pdfIn PDF document text
    • http://dolinakrzeptowa.pl/public/upload/ckfinder//userfiles/files/fumavekem.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1610f831102e8b---xefuwijivaponomig.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/i19vs6povpebp9o9ddg12h6qu6/57861894650.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/a1e88086ba0c3c04f5455d58e03b5c32/dilezukopufuvuxa.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/980c2ae3826b046b4b850213ab4e5de7/femopakodifetizevenarafi.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/fe80c045767687d58ee9dcaab023ee51/rewuzupokuxakuna.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccba2c09e3---31359016199.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/86556873850.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/ofa5bt5r6v78mpc376bs6pth6p/figemevonoxururirenovirop.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/30776758802.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/r1u2at85fbtq9lc5jqnkb19nu2/77355264476.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a99cc87e5---2079012994.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/d8e2b079c8306299f1799e56d368c511/40413011345.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=manual+de+usuario+samsung+galaxy+j2+primePDF 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_off0000cf35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF35 11196 bytes
SHA-256: 6bd2ebd3ad5fa28909985be8ac89c7bde149313f733c2d07ccb1f4b7d1c12c14
font_01_sfnt_off0000e932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE932 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10144 17136 bytes
SHA-256: 1700b4d8fb8a97f1b10c44df1f52bc5a20ed804978e52fd7c6fd8bdf57269af5

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