Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e9beeb26e3c160…

MALICIOUS

PDF

76.6 KB Created: 2021-09-12 15:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 62cf6f2b402cb9c1fcf479d7ade7e558 SHA-1: 62240cbbab9680ae8a45d6bc520f5587e4cc90ec SHA-256: d2e9beeb26e3c1608071808ff66b15ea8e9fa9a1152eb7d5a7fce9c1458265a9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://garglob.ru/uplcv?utm_term=sort+messages+by+date+android PDF link annotation
    • https://kimansion.com/uploads/file/kivivipefaditabix.pdfIn PDF document text
    • http://saraya-shop.ru/upload/files/2810767265.pdfIn PDF document text
    • http://bfcy88.com/uploads/files/97553076321.pdfIn PDF document text
    • https://homestayhoian.vn/uploads/image/files/pemexetevagalik.pdfIn PDF document text
    • http://karinameal.com/imgdish/files/75243265997.pdfIn PDF document text
    • http://d2dgroup.net/upload/files/fuvuxiwewuwudalof.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/23994921234.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/20843553153.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d3a723d9f---53128190739.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/topefabes.pdfIn PDF document text
    • http://romovi.net/sgi_userfiles/userfiles/files/zemibenalowufuja.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/9980295791.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/nemubokok.pdfIn PDF document text
    • http://stroyvodservice.ru/upload/File/36145877299.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16132c424731cb---1108881165.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/95040862319.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/motubuwigaxoxiwi.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210901_314627F6D0F247B6.pdfIn PDF document text
    • http://lovesenergy.com/file/lazilufaw.pdfIn PDF document text
    • http://taociren.com/upload/file/2109011757214495028gcwg04mhz9a.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/60636530068.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/44124456120.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/21251678215.pdfIn PDF document text
    • http://seasonmediagroup.com/pic/file/jemivojunozunisaxizuke.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_off0000c8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F2 16636 bytes
SHA-256: c088b4b2e5d4147ea96c40452508c149c5d27a4d618cc1ee36f70100ec6e881f
font_01_sfnt_off0000f3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F1 10876 bytes
SHA-256: 238f8773cdfdda228e76f1933947b7dd1fe65b2ff47bf3cb3a11bca7b01cc7ba
font_02_sfnt_off00010ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1