Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f24f4958182ba02…

MALICIOUS

PDF

83.7 KB Created: 2021-09-21 19:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6ecb494a4fc0d025056636e2d7b9dcfa SHA-1: ce1ca6b8514c88203e72578303b17eb589ed86b4 SHA-256: 9f24f4958182ba023fe5878acc8a25b3748b9e3435c350b8c7e9588d2f8ad70b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded links, many pointing to unknown or potentially malicious domains, suggesting a phishing or malware distribution campaign. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further supports this, indicating the document is designed to host numerous links on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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
  • 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://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161350f6a9d447---17375433038.pdf In PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/26965718547.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/temitub.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/wajibaselumajowaveras.pdfIn PDF document text
    • http://chongthamphucthang.com/images/news/files/doragugotabum.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/zitibumem.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/44176677653.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/nadulaliso.pdfIn PDF document text
    • http://studiolegalebisantis.it/userfiles/files/gedanopadawifenemolew.pdfIn PDF document text
    • https://almentispharma.com/ckfinder/userfiles/files/menodusezovuwow.pdfIn PDF document text
    • http://kystar.net/filespath/files/20210916235346.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/xusumonolomedavegekozok.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/73556461331.pdfIn PDF document text
    • https://maurinet.com/userfiles/file/fetetimolobuzelozunevuw.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/febizupedevujibevarud.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/nokijejaruzubesel.pdfIn PDF document text
    • https://planningpvedh.nl/ckfinder/userfiles/files/87797849160.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/zodigodewofilulojegaw.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/vepasutoxulaj.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/pelowewilikos.pdfIn PDF document text
    • https://www.piramideidiomas.com/ckfinder/userfiles/files/jezotaziwalirebiwelese.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/sodotadevuwepol.pdfIn PDF document text
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/28837299571.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/donelepaxafamuw.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/kozefunotavisokesob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=mcpe+car+mod+downloadPDF 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_off0000da17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA17 10396 bytes
SHA-256: 3fd29ca0dd782b8161c7cd5f8b4bac0a32bf9c9b21326da6eebd92ad588602b8
font_01_sfnt_off0000f19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B0 21460 bytes
SHA-256: 8aea49b139f52f1d9a67b1e44128e2c5289763b7472d79b5fa24d575ec04b88a