Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c214376382e96f…

MALICIOUS

PDF

86.2 KB Created: 2021-09-12 11:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9f84dfe983fe189465b190aa9fa8534e SHA-1: b3ae7c1c564745670f3b44adb7353d72de3895c1 SHA-256: 67c214376382e96f93045e47390a5d63d4389b3948cf150d6391b1103faa6ac6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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://alubiasdetolosa.com/files/galeria/files/xuwere.pdf In PDF document text
    • http://aerotherminsulation.com/userfiles/file/29548177374.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342f65972a3---78509379619.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/tolusesumipubumawowom.pdfIn PDF document text
    • http://caogenzhiben.com/filespath/files/20210911215526.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/79326374246.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/pijadarija.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/83809239450.pdfIn PDF document text
    • http://agilesolutions.in/uploads/sobafexekutukomate.pdfIn PDF document text
    • http://nena-artspace.com/ckfinder/userfiles/files/zateguxofunom.pdfIn PDF document text
    • http://belly.bpv.su/content/files/files/fusetizejabijolaxaf.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/pugamemovusen.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/12457959819.pdfIn PDF document text
    • http://xn--9i1b14lzokxjcrti5um.com/upload/fckeditor/file/gutadi.pdfIn PDF document text
    • https://vinniescustoms.com/userfiles/files/gidonevowafo.pdfIn PDF document text
    • http://sten.kr/club/data/userfiles/file/20210905044847.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/63814103299.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/8585484779.pdfIn PDF document text
    • https://inks.bg/userfiles/file/zakoziwoguvaxosetaxeru.pdfIn PDF document text
    • http://vuason.vn/upload/files/70355546293.pdfIn PDF document text
    • http://net-marketing.hu/images/files/jikej.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/8063032943.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=best+offline+gamesPDF 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_off0000ef0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0E 17168 bytes
SHA-256: 41e0b39fc47fc4dd5d21aa14e3922ae0f6f4b0cb28ebff2b8e6eb2009b3e8577
font_01_sfnt_off00011ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA6 10512 bytes
SHA-256: d40d8e7502507d38230ef2a2654e1f6c50c567a6aa3a9ba8c4681071047a1e09
font_02_sfnt_off0001339b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1339B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.