Malicious PDF — malware analysis report

Static analysis result for SHA-256 c266f4880294501d…

MALICIOUS

PDF

77.9 KB Created: 2021-06-12 06:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 25cb4b2a1fdf8c6b3e54b86099719f1a SHA-1: 2962f4cf01f8825135c7fdebc389142dbe5f504d SHA-256: c266f4880294501d4962c3749a80d8413f372a927698211bee1c2d11b2051913
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, likely to distribute further malware. The embedded content suggests a lure related to 'fall guys cracked games' to entice users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://infrive.ru/uplcv?utm_term=fall+guys+cracked+games PDF link annotation
    • https://angkortaxiservice.com/userfiles/file/maxevowadokonupemamitifap.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/41418280059.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/gagirefabirurefepolefe.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd10a9f610---nudowabogunaregevemu.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f01bdc013---47686549677.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dccaf3e3af---terepetowejosora.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16091b72a5b804---59654239106.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/94c48b96b50b7b00fb724de2f6d2b5c2/vusofiwajisek.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/d58453e87fc9c7b87bff28421552f1ee/74888763208.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/bd639f8dba952ec0c2d9fa1dfb58b62e/nasemanud.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/1980f7cde109fcc08ddfa29f349aa881/17195490404.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/teragapafex.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/4914bcea3975532bc2f81fd5e77c6a3f/giwaf.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/8s3vrvi7b56tkij0mrshfne4ms/monofobafodamasuzagomu.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/49ae1e26bdb9cb496555346f570b9e45/joresanevifapuvoz.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/nqnip7i1cc82ge22nor3uaqhvl/66323874698.pdfIn PDF document text
    • http://gaongonmaiphuong.vn/webroot/img/files/loruxodar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE954 5380 bytes
SHA-256: e7da11461fd064419a9848fdc1a7bfced00e9d0ac42f219573d86f43bfa31521
font_01_sfnt_off0000fb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB97 2044 bytes
SHA-256: babc028b02039550d9c0d01550e5e57a0c76770a29f74e542451f310a98bca3e
font_02_sfnt_off00010516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10516 10520 bytes
SHA-256: e2f695be92dbdc1614f6ba84e98198fc0bc0a0fd39c4fb391a8de1d4603367fe