Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c0e1930cb7ef26…

MALICIOUS

PDF

78.6 KB Created: 2021-09-20 21:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d574b9c4e87ee4d688305de3567922b3 SHA-1: 331a99c20d0a8385bd910f0d107fb612be6173af SHA-256: 06c0e1930cb7ef26245541101bb76f0c4f1a8b51cd5b72834f03f5cccf180498
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to various domains, suggesting a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://smidgel.ru/uplcv?utm_term=mod+apk+league+of+legends PDF link annotation
    • https://oriental-kitchens.com/userfiles/files/wagibamaluvadagakapixele.pdfIn PDF document text
    • http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/70408273895.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/10dbf7aa77caf1ab6c67d433efd1bafb/juwifabejeti.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/paxoginazipupaxu.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/97190369836.pdfIn PDF document text
    • http://gizmakina.com/depo/sayfaresim/file/88859231104.pdfIn PDF document text
    • http://keramann.ru/uploads/files/10119264033.pdfIn PDF document text
    • https://banerjeetourspecial.in/ckfinder/userfiles/files/24442723995.pdfIn PDF document text
    • http://drumlockingclamp.com/FCK_Editor_Images/files/fufedojasofijof.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/14721357267.pdfIn PDF document text
    • http://griesvoegwerken.nl/UserFiles/file/lasobuwububevaxox.pdfIn PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/valeg.pdfIn PDF document text
    • http://newo.ru/files/files/15221708210.pdfIn PDF document text
    • https://legyenegyjonapod.hu/userfiles/files/tuvadobebizagumejigojow.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/t7r74sj812vvuoi29f9eg4dbtj/86005201457.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/10361756306.pdfIn PDF document text
    • http://deleeuwputten.nl/site/data/ws/files/24360192062.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/19781848068.pdfIn PDF document text
    • http://cesvil.it/filesUploads/file/562034721.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/9468827225.pdfIn PDF document text
    • http://www.eau-msu.ru/ckfinder/userfiles/files/gunimaliximamoxetefepe.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/kedegipos.pdfIn 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://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_off0000cf3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE754 10568 bytes
SHA-256: b7aee0063f78e052a0f08eee7f0b3867c5eb63bbb63b59712009773d6ee9e3b9
font_02_sfnt_off0000ff5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5A 17792 bytes
SHA-256: 578c16c68b8d2b4e321e1faf35d5b879dbb129d2c50a75ba12b1670c9cc69a5c

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