Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cfcab18b988a708…

MALICIOUS

PDF

79.4 KB Created: 2021-06-16 17:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6427c8dd0b29703eb2d5e2db2822b886 SHA-1: 3e9298d7e3819828e5bdb024267c0982552126f3 SHA-256: 5cfcab18b988a7084a0f080e71f12e061d759bc98bad1875efec922a1ba03a61
156 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous links to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'crate opening simulator rocket league', indicating a social engineering pretext to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://synerhu.ru/uplcv?utm_term=crate+opening+simulator+rocket+league PDF link annotation
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bea41061531---7518702874.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/47143960444.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e4b041384---porupolefeme.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/dd7f11ad26c1b096e4d57e162eb8bf2b/zujalolepefimunedak.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/zevowix.pdfIn PDF document text
    • https://latework.cz/soubory/11649238847.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/fd7ia1hcftpibpkntgddaj9d26/xuxevipogorunoxumalafovel.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/zuwukujosofinetemufafe.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/df20681bf25a7eed71d613038f4e6691/niwajebesos.pdfIn PDF document text
    • https://loctra.net/userfiles/file/74037409557.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8055ae210---dirabalulovaluxetevox.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086698113b4e---4076209609.pdfIn PDF document text
    • https://auto826.com/uploads/files/mikepow.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/e9c89e90d58285327d160bf8a16369c7/79632917690.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/wewiginubagekur.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a55c2b165b1---30852164706.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0d5de6714---64035677990.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/fajuzeburifufuxolomoxoj.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_off0000ebba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBA 5224 bytes
SHA-256: b4ba10c5b4165f2534194402b161cadefe74e7d700a7ff70a73f12c50bebf103
font_01_sfnt_off0000fd63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD63 2400 bytes
SHA-256: 08c8398981a39254df0e484e67db194b5cf6cc246d0ccae6a3bd57e86d4a3e2e
font_02_sfnt_off000107f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F7 11640 bytes
SHA-256: eeeda17b4ffbe3d874ac72d42d8216b0fd9c0724dba2ed5e9c098fd2cc46ced1