Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e6baf77990603e2…

MALICIOUS

PDF

76.8 KB Created: 2021-09-24 06:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 785482c17b30cee14e5c332cb4950740 SHA-1: 57d4ec86884c25d39c6ea15d6773cdedea612bd4 SHA-256: 3e6baf77990603e2dbedcef106cabd7ede5badaaca40fef5a04547fac764fbc1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification further support its malicious nature. The presence of embedded URLs suggests an attempt to redirect users to malicious sites, likely for downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=sufna+full+punjabi+movie PDF link annotation
    • https://khachsan295doson.vn/namthuan/images/news/files/11675676792.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/35577291384.pdfIn PDF document text
    • http://olddieselparts.com/ckfinder/userfiles/files/80741726552.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/rojomakifudovutilopeli.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/bimasejuwojalu.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/fapizafirixu.pdfIn PDF document text
    • https://vjlabor.pitscovn.com/uploads/Upload/files/45369676532.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a642a2cbc---ropuwipidotube.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/banofemalaluwudadulekobuk.pdfIn PDF document text
    • http://pincesorvarshop.hu/editor_up/fabidikatorimafexukovaz.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/talepak.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/roxumavonigepudila.pdfIn PDF document text
    • http://temple.mo/userfiles/file/46148705435.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/26985136238.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/likijefilogilabutoju.pdfIn PDF document text
    • http://mediacast.vn/ckeditor/upload/files/15041107069.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///vasuwegaxomufidiz.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/tiraxow.pdfIn PDF document text
    • https://synersys.fr/contenu/file/32743266207.pdfIn PDF document text
    • http://isvpro.com/custom/files/sofizubazolemonepoja.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/30946987071.pdfIn PDF document text
    • http://www.icf-plant.com/files/file/47731220504.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/8919860254.pdfIn PDF document text
    • https://contemporaryteas.in/admin/uploads/file/getadumozamewujegu.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_off0000c810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC810 17452 bytes
SHA-256: a0557c33fd4e85d3baa6d3d4ca78a82d5fd834639ffb844908761d0e47e63de9
font_01_sfnt_off0000f562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF562 10664 bytes
SHA-256: 3e29f13accadc6a2dac8467c2b0a95eff565f261d891f5689e8bafc311608556
font_02_sfnt_off00010d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1