Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1ece7e6bdbbf8b…

MALICIOUS

PDF

76.4 KB Created: 2021-10-03 00:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: d3ea05a165a07cc5aa9994a063796216 SHA-1: a0fc3712542d65b242a2e0e975ac66dc11d426a7 SHA-256: 9e1ece7e6bdbbf8b62d193f865b25ec06c2a9ff1ab24c4f312f201760c582096
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 https://1tlstar.com/storage/uploads/files/ribamilofare.pdf In PDF document text
    • http://redemaisfarma.com/userfiles/file/71554607389.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/gafozikamuraxosodatavodi.pdfIn PDF document text
    • http://aromata.ru/upload/files/gemozefatomi.pdfIn PDF document text
    • http://neteyes.eu/editor_up/64524449658.pdfIn PDF document text
    • http://shangrilayunnan.com/ckfinder/userfiles/files/xalubipajenipuxelovilov.pdfIn PDF document text
    • http://controlsystemco.com/cache/fck_files/file/fekasilitixefogobakusozev.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/gofipotulotomezajefe.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210912_333629F40BC1194D.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/gunof.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/sabixorevapopanax.pdfIn PDF document text
    • https://krygina40.ru/UserFiles/File/nomuxemonejovobesolawo.pdfIn PDF document text
    • http://spartapr.com/images/upload/file/41432830129.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/notedu.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/ruvumogokazebunebefibepaw.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/35213652822.pdfIn PDF document text
    • http://skia22.ru/pic/file/sagegaw.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/54284274362.pdfIn PDF document text
    • http://albertf.madteam.net/ckfinder/userfiles/files/78509089049.pdfIn PDF document text
    • http://tythb.com/uploadfile/files/jikekotaja.pdfIn PDF document text
    • http://benetalent.com/upload/files/lixogowe.pdfIn PDF document text
    • http://net-work.cz/data/file/lijaxejofi.pdfIn PDF document text
    • https://membermimpi.com/contents/files/kubajoledegumafu.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/lolobivoguvelazarizo.pdfIn PDF document text
    • http://mikailang.com/userfiles/file/20210929083517_233601029.pdfIn PDF document text
    • http://minhnguyenvn.com/uploads/userfiles/file/8847335400.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+save+a+pdf+document+on+macPDF 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_off0000c1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FE 10784 bytes
SHA-256: e0c698224e249a4f75521a375f12105ee4e007ebe5b2acf60ccfe763a14b4181
font_02_sfnt_off0000f2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DF 18920 bytes
SHA-256: f39eeb9064276953d31b4a8cc5485e76181a7e207a463dd443a01ea9b72c6a72

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