Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff3677919edfbcf…

MALICIOUS

PDF

76.5 KB Created: 2021-04-20 08:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3470a9e3779cf70e1753ceaa0e892fb9 SHA-1: 4adf082f366e98cf0dfe4eab1c65367aad141067 SHA-256: 0ff3677919edfbcff63ffa4bbbb000ff7353c92ea7f451b85b70b7e66650b8f6
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though obfuscated, contains text that appears to be a lure for users to click on these links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=war+horse+play+monologue In PDF document text
    • https://ragevixaduwoper.weebly.com/uploads/1/3/4/4/134443655/6945013.pdfIn PDF document text
    • http://tells.fun/chopin_ballade_no_4_sheet_musicufh3k.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/ihhigce/mother_earth_brewing_llc_kinston_nc_28501.pdfIn PDF document text
    • https://bizataganuka.weebly.com/uploads/1/3/4/8/134852000/xutedikiwikiwek.pdfIn PDF document text
    • http://carishr.com/sadewarinaribizbptg5.pdfIn PDF document text
    • http://50offit.pro/123545920060r5nf.pdfIn PDF document text
    • https://cdn.sqhk.co/sebetite/eLL8FhQ/94634709380.pdfIn PDF document text
    • http://texno3ua.com/powerflex_4m_modbus_addresswl92r.pdfIn PDF document text
    • https://tawuvumiru.weebly.com/uploads/1/3/5/3/135326103/85c4392bed5c06.pdfIn PDF document text
    • https://muvisodujop.weebly.com/uploads/1/3/4/3/134358588/wudesiduboto.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/hjvNhhi/santorini_wallpaper_iphone_x.pdfIn PDF document text
    • http://myfoxing.online/duraginotem63ga.pdfIn PDF document text
    • https://xajoxivanuxus.weebly.com/uploads/1/3/4/4/134432241/zafasarufate_buwofegexo_nenirivuri.pdfIn PDF document text
    • https://cdn.sqhk.co/gipekoma/hy9hcif/vowozoxufisulebeju.pdfIn PDF document text
    • https://mavipevawifuduv.weebly.com/uploads/1/3/4/5/134598931/xixaxoxufojet-govudupeduv.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/juliziwojatige/5551373840.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/clasificacion_de_las_cuentas_por_pagar_a_corto_y_largo_plazo.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/nobezelulozidema.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/tea_bag_gift_poem.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_off0000ed49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED49 5348 bytes
SHA-256: e1d6b9e4e4d98b1966927727ec944c7c86c61c3088815087d781d0e4bc102b31
font_01_sfnt_off0000ff65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF65 11060 bytes
SHA-256: 592125c16b50d6671da6e59b68431784fc8219a507f2917e4b82f22c8cc808eb

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