Malicious PDF — malware analysis report

Static analysis result for SHA-256 334f3d770d018b1d…

MALICIOUS

PDF

74.2 KB Created: 2021-02-14 03:50:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9f14025d8250cf98c734accb9fc13866 SHA-1: 0dbb126eb49a57c3fe38ee921b6cf9085c824879 SHA-256: 334f3d770d018b1d97ada9eb7bffdbf31a299a88a1582c6ffaba128d6caacbbe
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious lure, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=cios+installer+wii PDF link annotation
    • https://muxetomanudone.weebly.com/uploads/1/3/1/4/131406273/foxubigulikubig-movanenufibi-kugoxin.pdfIn PDF document text
    • http://moviesaddaa.online/11970444453a6vie.pdfIn PDF document text
    • http://shmelev.pro/karibufuligujqyea.pdfIn PDF document text
    • http://solapp.xyz/sirupokezijapedikado82w32.pdfIn PDF document text
    • http://nasty666.space/bapofe9971o.pdfIn PDF document text
    • https://vigedinolig.weebly.com/uploads/1/3/1/3/131380992/0b476ae973209f0.pdfIn PDF document text
    • http://instapriz365.site/joyce_meyer_bible_study5kagb.pdfIn PDF document text
    • http://xejevojesinil.22web.org/google_authenticator_apk_uptodown.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vawoginele/28871799167.pdfIn PDF document text
    • http://texatutegelemov.rf.gd/94536942876.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/xubebokemumeli.pdfIn PDF document text
    • http://zasejaruzakir.rf.gd/84399388984.pdfIn PDF document text
    • http://sosirowop.epizy.com/43289489538.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/a_thousand_years_piano_sheet_free_easy.pdfIn PDF document text
    • http://gelopet.epizy.com/free_todo_list_html_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/16826054579.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A4 4580 bytes
SHA-256: 8d32bae1f15cf8457ef391f1d91c413868fb623acb2d5b6cb714de9110d558f4
font_01_sfnt_off0000e946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE946 10648 bytes
SHA-256: 92157826524d3b6502b29de188543fc908d1381bcf7ed1da011487c366fa6169
font_02_sfnt_off00010d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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