Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff67b5d18cf0493a…

MALICIOUS

PDF

70.3 KB Created: 2021-09-17 22:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e3ddf46666bce74a06cf7c9ad5aa115c SHA-1: d21db9da62e7569f632c0202b2b1f19602bfaafc SHA-256: ff67b5d18cf0493a23c2d8db7f9ca6795b4ef577a71dc4c745a82dfce331d657
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, hosting numerous external URLs on disposable domains. The PDF document contains embedded URLs that likely lead to phishing or malware distribution sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content, potentially leveraging JavaScript for obfuscation or execution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

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 https://coretry.ru/uplcv?utm_term=how+to+use+my+phone+as+a+ps3+controller PDF link annotation
    • https://cam-ceeds.org/ckfinder/userfiles/files/4557555122.pdfIn PDF document text
    • http://vattuxaydunghl.com/userfiles/file/4208241127.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16140f794abf96---bizudalawavedugel.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9a7fc5f12---zewesurupafobesarizupo.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/68090447059.pdfIn PDF document text
    • https://hotnewsmd.deca.md/upload/userfiles/files/41012629988.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/6185508913.pdfIn PDF document text
    • https://netiko.fr/img/Data/file/motaloja.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/64351313673.pdfIn PDF document text
    • https://transdeliveris.lt/userfiles/file/nasejelijoroduli.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/xekajigalawopobawamonexuk.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/pojeloxadazi.pdfIn PDF document text
    • http://4yoga.by/pics/files/budarilorofewovuwot.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/43721192847.pdfIn PDF document text
    • https://westhygiene.hu/editor_up/21904333008.pdfIn PDF document text
    • http://falconltd.pl/cache/file/kagubeza.pdfIn PDF document text
    • https://bhavanarayanaswamy.org/userfiles/file/jibometilexeka.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/47709043616.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/43945724281.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/17316895294.pdfIn PDF document text
    • http://nj-rshb.com/v15/Upload/file/2021942329219215.pdfIn PDF document text
    • http://leylasuren.com/images/userfiles/imagefile/84785266462.pdfIn PDF document text
    • http://designbyjoseph.com/uploads/File/losemo.pdfIn PDF document text
    • https://vnmmalta.com/userfiles/file/16883455946.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4F 18220 bytes
SHA-256: a538045dce2d1a3bf15f1a06c09483bb41662324954c3b63a0c0f5225c8a9cc5
font_01_sfnt_off0000fac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC0 11008 bytes
SHA-256: 3c219e014438500f46a0559babdccc640a30803acd2025ae54409c361d70c6b8

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