Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47bcc96ca0bb9ab…

MALICIOUS

PDF

74.2 KB Created: 2021-09-19 18:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0cf7bdb5110b8701e89184fed935492c SHA-1: 606be1efdb207788d951e23213dfd81b8fe3e9ab SHA-256: f47bcc96ca0bb9ab54e718f7e53b160987d67a73f78d2be70f156cfc6fe2a9c7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong likelihood of the document being used to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the heuristics and the embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://huntic.ru/uplcv?utm_term=the+best+ps1+emulator+for+android PDF link annotation
    • https://harley.dataroom.tw/upload/files/50999354827.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/9011066727.pdfIn PDF document text
    • http://hrudolf.com/userfiles/febew.pdfIn PDF document text
    • https://hoya.mobioptika.hr/UserFiles/file/limamadiretasulomujanulaj.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/fiviganuzep.pdfIn PDF document text
    • https://razredna-nastava.net/files/59001120775.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/34b9d851668e2b350177b21066f8aafa/43445754224.pdfIn PDF document text
    • http://narzedziascierne.eu/Upload/file/58706585396.pdfIn PDF document text
    • https://olterus.org/contents/files/46577640496.pdfIn PDF document text
    • http://votava2.altrodesign.eu/ckfinder/userfiles/files/61468902044.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/pijuwawexivijezivifitiwim.pdfIn PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/jamobilagovekig.pdfIn PDF document text
    • http://1544-7419.net/upload/fckeditor/file/mewakisumolubexubekup.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/30247897148.pdfIn PDF document text
    • http://zhihepvb.com/upload/ckimg/files/202109140437453452.pdfIn PDF document text
    • http://balone.net/_upload/file///godirejorarizufututon.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/pufedavalafafenofivazalam.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/50389634314.pdfIn PDF document text
    • http://hillcrestneighborhoods.com/userimages/polarerovolimazidesikukaw.pdfIn PDF document text
    • https://istanajp.com/contents/files/jironakumezokin.pdfIn PDF document text
    • http://cutyoursupport.com/userfiles/file/niwidufa.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/pojimiwitid.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/65919011971.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_off0000c0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FF 16172 bytes
SHA-256: 57cae8118f771f580d404c62d6e0c51cc8b5db52e973f2108c9c98289820941f
font_02_sfnt_off00010274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10274 11020 bytes
SHA-256: 4490317e23aa1b026f6664deac9e6c1bbb355683ab645f93eab6c9481117e04b