Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01a8e33e6f05f7c…

MALICIOUS

PDF

70.0 KB Created: 2021-09-09 04:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4d6a58c469f88c16603e14b1947640f5 SHA-1: 35f4a857b8e9b8bcecab25222f063f0642b35a5e SHA-256: d01a8e33e6f05f7cddf9b8baac6765a20fd9a2ae8ba876edc709bf6c36b40e60
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://satyamtracparts.com/userfiles/file/matowidoxonavuf.pdf In PDF document text
    • http://linuxnewyork.com/draft/media/59884694066.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/22681476643.pdfIn PDF document text
    • http://zjgyuanhong.com/v15/Upload/file/202194659226347.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/fudikokawapewowidozopu.pdfIn PDF document text
    • http://bacsiha.com/public/ckfinder/userfiles/files/mijanamamet.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/f2432ce220bc8d5503bdbb8527d629a2/bumonifanelugijeguzun.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/gufunolenap.pdfIn PDF document text
    • https://siliconautomation.com/userfiles/file/bafisoxasi.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/92256334937.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-9-9/20210909081733234608.pdfIn PDF document text
    • http://cuanhuaabshanquoc.vn/files/resagitopuguzibarobate.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/wesujuloxulufitivi.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/wudurawalilorusipilukutu.pdfIn PDF document text
    • http://agppi99.pretty-match.com/upload/files/12208903407.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/92746054440.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/93252659284.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/73308667463.pdfIn PDF document text
    • https://net-mex.hu/ckfinder/userfiles/files/95393257685.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/ginerebenow.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/nerixowenatofatubuviwi.pdfIn PDF document text
    • http://sun-tes.ru/files/file/61278754764.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/fiseku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=redmi+note+9+price+in+bangladesh+colourPDF 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_off0000af1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF1C 16004 bytes
SHA-256: f1b3fdc36b6e1f3422a9b7253e3bead4b1e690e83e8188958e8413762cd548b9
font_01_sfnt_off0000d81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF036 11412 bytes
SHA-256: b095f34136b4fd8ff9b6acc750bfb336b62f29dc33fcfb71370ef1b92b6303de

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