Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c72714140f8287…

MALICIOUS

PDF

84.1 KB Created: 2021-09-15 22:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fd07ebe9c88cad98a668070680837666 SHA-1: 5d74056f622e79f080ad64b35cc27d4c7cc3185c SHA-256: 74c72714140f82872e6b613876681adc5e4d10ab18ab90752464f2a4a393e482
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware delivery document. The document contains numerous links to external websites, many hosted on potentially compromised or disposable domains, suggesting a link farm or phishing lure. The presence of these links and the overall structure strongly suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://garglob.ru/uplcv?utm_term=how+to+save+excel+in+one+page+pdf PDF link annotation
    • http://lauraestetica.com/userfiles/files/wefamonoreduku.pdfIn PDF document text
    • https://perfectsextherapy.com/public_html/userfiles/file/wokivawov.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/8f538a8ade7142e566ea9300e4b10857/56290186033.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/96418576474.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/demipa.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/gezemanapakujuvapafodaw.pdfIn PDF document text
    • https://interativacorretora.com/fotosempresa/files/22126581067.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/jikidopufukimabuxifazo.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161407a4c6066e---posatid.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/42293759387.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/12123958859.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/31154133185.pdfIn PDF document text
    • http://xn--989ap7r0xbd5x.com/upload/fckeditor/file/norilexigateniwum.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/vereduxafelebakojex.pdfIn PDF document text
    • https://learnrkb.jugalbandiresearch.com/ckfinder/userfiles/files/dapudiguwujobamenore.pdfIn PDF document text
    • https://24emk.ru/ckfinder/userfiles/files/75969403133.pdfIn PDF document text
    • http://tchid.net/userfiles/file/wuladuminikepa.pdfIn PDF document text
    • http://muszempilla.com/files/file/64727615634.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021090613124273499.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16131a9ac00baf---muzuwawaxopigozebifir.pdfIn PDF document text
    • http://gardatrans.com/content/Files/pojujetopukujowi.pdfIn PDF document text
    • https://kingcom.edesign.fr/gr33/web/uploads/assets/file/sanedazowama.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/goketi.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_off0000e472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE472 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC89 10940 bytes
SHA-256: 6a8a8000f4c7ba9965dbcb22f0089bca927b94ac56f28e5e107a946f708ecc43
font_02_sfnt_off000115d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D3 17224 bytes
SHA-256: e66e0c2f3ce45871561cafdb638124449abdc2f3b5673d30abcd4dd5e8149f52

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