Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d40b2e9098f48e7…

MALICIOUS

PDF

79.1 KB Created: 2021-09-21 07:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e6e5502aea9002c76ea076c1f1aa7156 SHA-1: 782fc463fcc5801d13b3d79c689697001149195e SHA-256: 0d40b2e9098f48e7d6e634205a228c2b50a35992709c11675efe62db84ad40ec
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating malicious intent. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution document. The embedded JavaScript likely facilitates the redirection to malicious sites, as evidenced by the PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=the+true+story+of+tom+and+jerry PDF link annotation
    • http://mosvag.ru/img/lib/file/62713441827.pdfIn PDF document text
    • https://anzhero-sudzhensk.verlauf-ekb.ru/admin/ckfinder/userfiles/files/wekopuwitifuzujun.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145668daaa39---39028042096.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/josatowis.pdfIn PDF document text
    • http://parikshitconstruction.com/uploads/belevafijugewilun.pdfIn PDF document text
    • https://dortmundpools.com/contents/files/wepis.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/69954082238.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/xurebileja.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/76698940330.pdfIn PDF document text
    • http://girisimcilikproje.com/resimler/files/sabofedokasilu.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/12508335628.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/majidafawadowiris.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/d2af957129d0fe5ba83cb714267803c4/98698646179.pdfIn PDF document text
    • https://natatourism.com/userfiles/files/jatoxuxusawexisis.pdfIn PDF document text
    • http://toyotaprius-custom.com/js/upload/files/53780247618.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/17601129493.pdfIn PDF document text
    • http://tupnate.com/ckfinder/userfiles/files/dararumefubemogomuvusa.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/202191949426174.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/52462623594.pdfIn PDF document text
    • https://szelvedojavitasmiskolc.hu/files/files/valuzowebo.pdfIn PDF document text
    • http://ltptech.vn/uploads/userfiles/file/97910851252.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/mesuwupejawuri.pdfIn PDF document text
    • http://gcoekmr.org/cukashmir/User_Files/imagefile/10319507834.pdfIn PDF document text
    • https://khmernative-rice.com/userfiles/file/57750626749.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/47152050954.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_off0000cf06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF06 17832 bytes
SHA-256: 5823cea5509b0c57ac6ce776a9e76de9cb38a7bcec2290ae742d57bc621005c4
font_01_sfnt_off0000fda8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BF 10788 bytes
SHA-256: 7878e78034a6e783644918983e05179c6a27c8aa67b7f38ae1af295675a0a0d6