Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d330cfb5b4626d…

MALICIOUS

PDF

108.2 KB Created: 2021-05-11 09:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 86086a3b99742fa8115b2df8132c83c3 SHA-1: eb274d3d91b94f9a27e08701af124e84473b2af2 SHA-256: f1d330cfb5b4626d4ed57652e5e253a20de99a1b779b5426eb3885c13e65337f
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly suggests malicious intent, likely for phishing or distributing further malware. The embedded URL 'https://mezovuduw.ru/strik?utm_term=tenvis+imega+cam+app' is a primary indicator of the redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/strik?utm_term=tenvis+imega+cam+app PDF link annotation
    • https://cdn.sqhk.co/giganopof/2aW43Ba/pewakovojojamuj.pdfIn PDF document text
    • https://cdn.sqhk.co/migukosodaza/2hhPih8/drive_in_movie_theater_nj_newark.pdfIn PDF document text
    • https://diwijavel.weebly.com/uploads/1/3/4/6/134691177/a9356484.pdfIn PDF document text
    • https://gotabidulubawob.weebly.com/uploads/1/3/4/7/134723529/xebemudajekat.pdfIn PDF document text
    • http://love-cosmetics.shop/extraction_of_actinideszle12.pdfIn PDF document text
    • https://cdn.sqhk.co/dagidomu/damgicY/jabukomodupaga.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/6ZjaOig/crossy_cat_hacked.pdfIn PDF document text
    • https://gabixolip.weebly.com/uploads/1/3/4/4/134492453/9983552.pdfIn PDF document text
    • https://semumivotuwebaz.weebly.com/uploads/1/3/4/3/134379403/bunepukijasafet.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/ihVijja/zixodoliz.pdfIn PDF document text
    • https://cdn.sqhk.co/toriwogadej/jhhajeS/fakek.pdfIn PDF document text
    • https://zalidumi.weebly.com/uploads/1/3/5/3/135351231/2760245.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/cRgdXif/fiji_airways_airbus_a350_business_class.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/resixexi/liftmaster_csl24vdc_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/stylesheet_in_html_document.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/venuzupesatiza.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
    • 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_off0001543d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1543D 5132 bytes
SHA-256: 310d0db7f1f73abc8141868bdd99125d4819eb6889e132c813755da524655ac5
font_01_sfnt_off000165b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165B1 11352 bytes
SHA-256: 66e16190e16bcc196a0f14062764d3f0d134c23031d58a401a2c8d662cf7fbbb
font_02_sfnt_off00018c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C75 17100 bytes
SHA-256: e86e5cfaee86cb7a3816d70613e725ef518e35eee2f98d47804d7942c14cdf58

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