Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e5aeb88d6ed3cbc…

MALICIOUS

PDF

70.7 KB Created: 2021-09-14 05:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 59f3294a0b74048af887afe08d4622a1 SHA-1: e96c55527408d713a0597608d59e39421cf68e84 SHA-256: 5e5aeb88d6ed3cbcbcc6a5b934569e984eb74dbe8a4a2f374756a84e5c72a70e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure itself may contain embedded JavaScript for malicious redirection, hence the T1059.007 technique. The primary attack vector is likely Spearphishing Attachment (T1566.001) given the file type.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6923

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134fb3f5bdd2---96216872162.pdf In PDF document text
    • http://jrpst.pl/userfiles/file/nedewetuju.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/tiwevedexiwol.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/kafikimasexiwoluk.pdfIn PDF document text
    • http://eternoohydro.com/d/files/fojagikuf.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/dadanexotivopojumonoxoxe.pdfIn PDF document text
    • http://viquadro.com/userfiles/files/91316433078.pdfIn PDF document text
    • https://rajaunited.com/contents/files/sikazedowezapon.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/50214385659.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cabe283d00---76860799770.pdfIn PDF document text
    • http://cloverdiamond.com/file/sowetimumoxatefun.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/wasexesivazew.pdfIn PDF document text
    • http://studioarchterreni.it/userfiles/files/25722300578.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/ranuja.pdfIn PDF document text
    • http://forumts.com/ckfinder/userfiles/files/86307541857.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/pugexuribadome.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210911150241388.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/64376252018.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/70912161023.pdfIn PDF document text
    • http://www.guus.edu.mn/ckfinder/userfiles/files/mipeg.pdfIn PDF document text
    • http://goldia.cz/data/file/1445335328.pdfIn PDF document text
    • https://tanhoaphat.vn/userfiles/file/reridejujuzupurijaweno.pdfIn PDF document text
    • http://lachambredechos.com/userfiles/file/tomit.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/80339750974.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/xebelunedivegobevekaturi.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/81548111024.pdfIn PDF document text
    • http://cyuansheng.com/userfiles/file/verojag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=best+pogo+spoof+locationsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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