Malicious PDF — malware analysis report

Static analysis result for SHA-256 b349318d4f2f4524…

MALICIOUS

PDF

78.7 KB Created: 2021-09-19 19:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5d1571bd6ab7f4ee9f4a7ea24c8046c4 SHA-1: 3f6580ce0fb80b1891091266e858dca0edded392 SHA-256: b349318d4f2f452468ad2335155586765b76b16261cfad38d71ea31b557b0209
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, many of which point to suspicious or unknown domains, suggesting a link farm or phishing lure. The presence of a 'zepeto mod apk no human verification' search term in one URL suggests a potential lure for users seeking cracked software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://huh.hu/UserFiles/File/wodijuxal.pdf In PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/vewemebakoneziwenukuvimu.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/vixipetepezebibovu.pdfIn PDF document text
    • https://koratspring.com/upload/file/papoj.pdfIn PDF document text
    • http://zeci.nl/im/image/99289098181.pdfIn PDF document text
    • http://designklasse.de/ckfinder/userfiles/files/39580305131.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/45768536699.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/40315352215.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/90614325560.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/vitilobojo.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210902_67A094FFD6CA91C3.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/94937663913.pdfIn PDF document text
    • https://www.wappa.com.au/siteadmin/ckfinder/userfiles/files/mavegozugaziduzid.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/jumadazegopiwal.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/mamivunazi.pdfIn PDF document text
    • http://maychaybocaocap.com/app/webroot/uploads/files/51363773741.pdfIn PDF document text
    • http://melodylavernebettencourt.com/media/file/tupajixapirexefu.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb97c18e4c---jekopesuluzanofusukulis.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/13369522313.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/xorodejojet.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/fc11dab307f129a561c94be66fc923a0/94444324370.pdfIn PDF document text
    • https://cakkue.com/contents/files/nuweme.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=zepeto+mod+apk+no+human+verificationPDF 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_off0000cf7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE791 10892 bytes
SHA-256: 2b67bb6668d79e67b03b6db388e2a7f591e3083c5063e699d0e8f56a84d5ae15
font_02_sfnt_off00010092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10092 17384 bytes
SHA-256: d0b711cd083b07cdc860ac03ed93d3caa4bc98dc2036162b67f90ed96f13c9a1