Malicious PDF — malware analysis report

Static analysis result for SHA-256 008f8501895b77bf…

MALICIOUS

PDF

81.9 KB Created: 2021-09-14 03:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8037e6c0d78afcae984a88644c74a5c1 SHA-1: 0f0b310a3a4fb48a20f27a8ba657a866e14fbddd SHA-256: 008f8501895b77bf981368253761736a1e3dc50151146186c76388c5c75658a8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are likely part of a link farm designed to obscure the ultimate destination. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were directly extracted, the structure and numerous external links suggest the PDF is intended to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://innotack.com/userfiles/files/negivasatedijo.pdf In PDF document text
    • https://stichtingech.org/ckfinder/userfiles/files/14747354052.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/tagozizadajetejigovuzuva.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/72257172235.pdfIn PDF document text
    • http://udaybharat.in/ckfinder/userfiles/files/63537748003.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/46631848830.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/57132965551.pdfIn PDF document text
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/bixagufaferebis.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/63460274754.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/57631918448.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/74363741456.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b537283fa---96341267005.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/94401365477.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/47957415132.pdfIn PDF document text
    • https://triyoga-tv.ru/userfiles/file/84853294576.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/bejenelepef.pdfIn PDF document text
    • http://vpecargo.com/userfiles/file/10852507670.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/2df894f0d2c02b51e41c8f83f76bb1a2/35573756364.pdfIn PDF document text
    • https://ladangmimpi2.com/contents/files/85238932729.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/53734711178.pdfIn PDF document text
    • https://aporpeter.ro/userfiles/file/zikaz.pdfIn PDF document text
    • http://lachina.cn/upload/file/kuneduxojomi.pdfIn PDF document text
    • http://blgjad.com/upload/files/repixapurunorobaleno.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/tajiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+connect+printer+with+android+phonePDF 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_off0000dc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC07 17536 bytes
SHA-256: 54a6fca2010164675d79e2982c478c0350e8b4e0aa2bb19c1feb3e8e02442130
font_01_sfnt_off000109df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F6 10472 bytes
SHA-256: 54897f565984e7bf4e1e7537502c957e1c093bb21404ae6de5d35ea783839ace