Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d270bb3edb3dfe7…

MALICIOUS

PDF

77.3 KB Created: 2021-09-16 03:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 57ddabffcfca227e915a98fa91376c74 SHA-1: 77656ffe86e23269929853937d0ec694a7e22b71 SHA-256: 6d270bb3edb3dfe71b23cf2447407c229eacf3250328a853587c18174a21ba28
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to various domains, many of which are identified as part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, such as phishing or distributing further malware. While no scripts were explicitly extracted, the structure and URL patterns suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://binarbaidfabrication.com/public_html/userfiles/file/lisiwejufexebaj.pdf In PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/ranesitopuxawifatid.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/176780.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/buzixuwifil.pdfIn PDF document text
    • https://cvzona.lt/resources/img/files/jipezigekagi.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/48454789928.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/42363079899.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/ug3hns79cbni2cucc6tf0egs1v/jubinurabukubefezuruv.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/52211481579.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/vomerulobutade.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/fevamitajudukudujoj.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/basiwodivotesad.pdfIn PDF document text
    • http://utcsp2.rustyramone.com/uploads/files/kilurulisikiwubabobub.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16141d8309d5bb---danitir.pdfIn PDF document text
    • https://clinicamanila.com/ckfinder/userfiles/files/68493404263.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/68597280356.pdfIn PDF document text
    • http://belean.pl/userfiles/file/nojovikivofeziguzofov.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210913215009.pdfIn PDF document text
    • http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25302752996.pdfIn PDF document text
    • http://yanarfabrics.com/firma/files/jejajozavifupawetej.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/63292403662.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/26652469873.pdfIn PDF document text
    • http://wenxuezj.com/images/File/972927693.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=battle+of+galaxy+mod+apkPDF 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_off0000c9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E8 10740 bytes
SHA-256: 7812a0682752b8d61c7cfb69d90bf9a8f961a5cdc61fa098330b20fd097c2889
font_02_sfnt_off0000fa83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA83 17360 bytes
SHA-256: dc6ca3fcbec77ae08ee744d1203c8f1efffca452049ac1808e04a5691e8e321f

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