Malicious PDF — malware analysis report

Static analysis result for SHA-256 737cc0587f3730ee…

MALICIOUS

PDF

74.4 KB Created: 2021-03-16 06:17:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d48ad014884e4cb8d60e72d2e3f32d8c SHA-1: 04797b0f0ff380387a4d9f0d4faacb0291826337 SHA-256: 737cc0587f3730ee091d37c0530d9647cb7effb68cf5fbc4e20efd35e77e30f6
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a phishing or malicious intent. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection mechanism to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to RC cars, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://kuzutuzo.ru/strik?utm_term=how+big+is+a+1%252F8+scale+rc+car PDF link annotation
    • http://nefusetas.iblogger.org/connect_motorola_bluetooth_headphones_n136.pdfIn PDF document text
    • https://cdn.sqhk.co/pijujuweg/jehiPf6/37533598133.pdfIn PDF document text
    • https://femodamokej.weebly.com/uploads/1/3/4/5/134529999/3d26c.pdfIn PDF document text
    • http://newyearshop.site/costing_format_for_manufacturingjcab8.pdfIn PDF document text
    • http://reabook.online/python_text_file_to_png768i6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421983/normal_5fdc5dfe07d56.pdfIn PDF document text
    • http://liolika-rsya.ru/sezesomapafoq2q.pdfIn PDF document text
    • https://delazodudiz.weebly.com/uploads/1/3/4/5/134591817/0b611d6.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvazuginu/hhjdjgc/83301292436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5fd8e6ca6a173.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/qjfgjdq/merriam_webster_learner_s_dictionary_premium_apk.pdfIn PDF document text
    • https://rilokudewagozem.weebly.com/uploads/1/3/4/5/134597993/986772c72ba63.pdfIn PDF document text
    • https://cdn.sqhk.co/tofegejij/ciaggfW/toca_life_farm_apk_cepde.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dulaxidej.epizy.com/kielbasa_sausage_sheet_pan_dinner.pdfIn PDF document text
    • http://lobabixagoxip.rf.gd/nalege.pdfIn PDF document text
    • http://dokajita.rf.gd/ruresum.pdfIn PDF document text
    • http://tuzotulerijenej.rf.gd/bapumon.pdfIn PDF document text
    • http://jopiwutiz.epizy.com/auto_shop_near_me_now.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D0 5440 bytes
SHA-256: dc93d68e8f64dc2d09960d41a399548cf95d32564aabc9a867bf5f5ad3afaf8b
font_01_sfnt_off0000f582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF582 11244 bytes
SHA-256: 3da0b426eaa2abee201e7c72b34a17ede025e24ac5109a4d79194c9d1af2a22d

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