Malicious PDF — malware analysis report

Static analysis result for SHA-256 896970ef5bdb43df…

MALICIOUS

PDF

83.9 KB Created: 2021-09-17 02:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 29b2d9adfde7652a8e5e2abca9b43d6a SHA-1: 85499c8fe0ed0347e241dae55a4a42ce1423bb13 SHA-256: 896970ef5bdb43dfe683f01aa8c9287a866aeaaa77dbf080510a6e71d00d7f12
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous embedded URLs, many pointing to suspicious domains, which are likely used to redirect users to phishing or malware hosting sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the malicious nature by indicating a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://thaiwoodengames.com/files/upload/files/soxigenu.pdf In PDF document text
    • http://atek-ent.com/upload/file/javonafizapewotewutaju.pdfIn PDF document text
    • https://mangallagn.com/images/file/66868646183.pdfIn PDF document text
    • http://emeat.ru/var/files/furekiwonovewasa.pdfIn PDF document text
    • http://aylabawadi.ae/userfiles/file/getogudovi.pdfIn PDF document text
    • http://craftland.de/res/wysiwyg/file/dideletitegexojoj.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/laboseverilevomipigi.pdfIn PDF document text
    • https://strefaokazji.pl/uploaded/file/wufamefususewasokevu.pdfIn PDF document text
    • https://mp2020.csysadmin.com/ckfinder/userfiles/files/ketokesederuwamisijaboze.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/vanoj.pdfIn PDF document text
    • http://grandfiltr.com/files/file/61986115327.pdfIn PDF document text
    • https://denimder.org/resimler/files/sedabujolita.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/joleralomopowevixumexav.pdfIn PDF document text
    • http://orthopediedelft.eu/files/pixufemazepetowutitud.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/og55asfruv68ga2tg98helm2c5/79417645010.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/67336763068.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/9b1d599a9e4037cd6ac63ed9ee65c0b8/30410793411.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021091706034444.pdfIn PDF document text
    • http://nghieuphong.com/upload/files/52686449796.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/tudagujefotewutekirofijeg.pdfIn PDF document text
    • https://masihpt2.com/contents/files/39403499331.pdfIn PDF document text
    • http://www.poliklinika-hb.cz/userfiles/file/85662564826.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/91930171470.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/lizabidixexatajobag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=mac+id+changer+for+androidPDF 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_off0000e1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EC 18788 bytes
SHA-256: ce7bbc3c3d4b43fa3aa7648e491cff54507962e2b61ef1b0ba6d4b20faa703f9
font_02_sfnt_off00012aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AED 10436 bytes
SHA-256: 4ebe3ad686695adeba185c4962d7e404244ad236f6968598741454f41e44989e

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