Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d1212c3777fe3e…

MALICIOUS

PDF

70.1 KB Created: 2021-09-27 06:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b72aabe0272775f4fcfcfcdf7c092c12 SHA-1: a3d2226fcc9e18ad6f6b18f7106a5445a2dbf9a9 SHA-256: 44d1212c3777fe3e229bca99098fcd52ac3846737ffa6469294e2dbf217914b9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection or further payload delivery, contributing to the overall malicious nature of the document.

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 http://vipforiraq.com/userfiles/files/41995270696.pdf In PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/71452154553.pdfIn PDF document text
    • http://erex.hu/upload/file/tamibapetu.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210914050609_nfkyb4.pdfIn PDF document text
    • http://xn----7sbev0bhje.xn--p1ai/images/news/file/30845153265.pdfIn PDF document text
    • http://hardiebase.com/uploads/assets/filefile/vodijawapelapexafuwibi.pdfIn PDF document text
    • https://ksi-system.pl/editorfiles/file/rigupixi.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/28425285091.pdfIn PDF document text
    • https://b7b.reviewz.eu/app/webroot/files/userfiles/files/vovumupenejotuvunorofuved.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/b60df3b7dc781b9eb8d330125de78195/17573151407.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210917232238.pdfIn PDF document text
    • http://kokocurry.gm/userfiles/file/gosibinimike.pdfIn PDF document text
    • https://ccskin.com/geektic/files/wipanetusuvi.pdfIn PDF document text
    • http://theseadiaries.com/ckfinder/userfiles/files/48204077514.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16145f5dc4cca6---56037855431.pdfIn PDF document text
    • http://ropesadventure.com/d/files/luposew.pdfIn PDF document text
    • http://savages.lu/imagesRTE/files/fizupoguzurifobogeposivus.pdfIn PDF document text
    • http://vkts.se/userfiles/file/7089353509.pdfIn PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/jolujoxunafu.pdfIn PDF document text
    • http://gaestehaus-am-erlkoenig.de/img/editor/file/50859774501.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/tulele.pdfIn PDF document text
    • http://lawyergz.net/uploadfile/files/95992074605.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/pupevadasadapobawafobuno.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/meratax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=dr+fone+ios+full+versionPDF 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_off0000b2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D8 16168 bytes
SHA-256: 10c99e51a07ed261e5d09de7417a53a8980ac9072e1360edf8330e4e2abec659
font_01_sfnt_off0000dbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD5 10112 bytes
SHA-256: 948aa97eb0f15540e8e16e5d8ae48fc67aec6cc3169403fdcc278610f8284c57
font_02_sfnt_off0000f285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF285 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1