Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2ec99d5c84aec2…

MALICIOUS

PDF

211.0 KB Created: 2021-07-03 12:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4beb722edccdb8c2add85213749d516e SHA-1: 8ab0391f7c0dd82bf633ab5ae5964616774a0bcf SHA-256: 7b2ec99d5c84aec21000fbfd350254a5d99f39b5f5f5f4905ca63cd900cc9074
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The PDF structure and embedded URLs are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9808

Heuristics 5

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=is+it+bad+to+eat+red+meat+everyday PDF link annotation
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/spcdlvcn6otqvg6n0069d6ula1/setidigozaxesiwum.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/sidav.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/37353786274.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/f3fddba63d5e2207ffcc28c1e6da1d43/mufuzumuvogisememubazerim.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f45e70e560---23452914008.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d5db57e5f33c4ebb8d1dcac98dd0a355/7995100162.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093de67c3b2c---99038943019.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/20754410358.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a69679cce---xototekadopaziralizesonod.pdfIn PDF document text
    • http://dharmapremipariwar.org/userfiles/file/pafedogobubixuzen.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/5c35a27caed336deb4d5b106f770bcfc/wetakufibuteborupebipezuz.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/9aeeba963fd91995b2efd75fb5c899fe/50733378347.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c94b22511f---68343311558.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/412cvp7isvbqh37rnd80hue9gq/46045725975.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608937ef8b56f---16066077647.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/f68dad37aa8daf58c143083972d6083a/fofotubelogenezor.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f4f58835b---wuguwazabajeneseb.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/16271525581.pdfIn PDF document text
    • http://markone-tools.com/upload/files/wulitidit.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/divuluzusebowemojarela.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/c66f0598154249dbaaf5d8917ba3e2b1/18938967070.pdfIn PDF document text
    • http://charivne.info/images/file/pakebojenuvarobusix.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e21d43e2a---5397618852.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/bbf09a267a48a138bf8739b5a7f38f68/41219595583.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/60e7317325cea78596be1bf79d57775c/tifukeki.pdfIn PDF document text
    • https://taxiparga.com/wp-content/plugins/super-forms/uploads/php/files/ddecfb11d268871d3d9f0442923e5190/95035992957.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_off0002da82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA82 19988 bytes
SHA-256: 2f7025ccdca9ebcae57d988f67da79c20943bf10a531934fdc35ca9802dcb2e0
font_01_sfnt_off00030d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0003259e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3259E 10528 bytes
SHA-256: 6d0903e081a52705e68540b3d33ceb11e5922d21d55801f9bdcb9e53770a5169

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