Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1cb45d9b795ae7…

MALICIOUS

PDF

80.4 KB Created: 2021-09-07 06:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 92a6d00538b68dbbf60bd4acc2ad3797 SHA-1: e026344f371c3075fa21487f4ddd23643f7557ab SHA-256: ba1cb45d9b795ae7c4503a57294db2e764c9265e7f70f88baf49e167787f4234
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://crewmak.ru/uplcv?utm_term=north+america+blank+political+map+pdf PDF link annotation
    • http://abpjse.news-read.com/upload/files/38217627515.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/c5240dee22f07d39f84049f59cb8e8b8/38144318369.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/16005232202.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/fc43d966bde4b1bbef89b867d2a295ce/96249533780.pdfIn PDF document text
    • https://padservhosting.com/userfiles/file/81395539568.pdfIn PDF document text
    • http://kiuanai.com/userfiles/file/pitokafinajemimevesipu.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/nhk4b6mgc3s2a5mccr14oto9hh/donazujijasugadegasezodes.pdfIn PDF document text
    • https://goldgreiner.de/userfiles/file/87430765718.pdfIn PDF document text
    • http://aatmicscience.org/asuserfiles/file/18253728388.pdfIn PDF document text
    • http://gulfcoastlist.com/userfiles/file/32600657110.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/5hg0uvb7l40o5r95564snn2hc6/3732078522.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/72045035432.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a25a5c97e99---98319192327.pdfIn PDF document text
    • http://slsnn.ru/content/file/99257692908.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/42c1dc4cc17d6c201ccfb06256cea947/48558916589.pdfIn PDF document text
    • http://susasoft.com/upload/userfiles/files/lapoxanazoteligoxomeli.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a870f62b7a1---91282147008.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c22823ae688---puminogin.pdfIn PDF document text
    • http://asustainable.com/global/file/dugukosawoxawuwozupixita.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/4ej1svr16spr7l5p1mnadvojse/mapaxu.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/62742786269.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/1cc84c9ee27a21b4dc37d41845c02239/gasobewujadofenebaf.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_off0000d644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD644 10924 bytes
SHA-256: e1f1b9f43a34d298cd877f5ea0b79f1634a12e423a9fb99bfc08c4eb65860c16
font_01_sfnt_off0000ef1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1B 17424 bytes
SHA-256: 86e6ff06387a216a9c7469c028686c3343dc27e8044adf62b04a3ccfd549cb9a
font_02_sfnt_off00011bf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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