Malicious PDF — malware analysis report

Static analysis result for SHA-256 731f695adbb728e6…

MALICIOUS

PDF

73.9 KB Created: 2021-02-28 12:05:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 91d04db6c85859f6993dee65f9ec8999 SHA-1: b269a8a78e0513cadc342befbc1c0e5164ef1e69 SHA-256: 731f695adbb728e6d636fe99432a05bca7b5745157da22202ae4367c2cc90e53
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV also detecting it as a phishing trojan. The document functions as a link farm, containing numerous external URLs that likely lead to phishing sites or further malware. The presence of embedded JavaScript, although not directly analyzed for specific actions, suggests potential for malicious scripting to facilitate the redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://lozipotod.ru/wix?keyword=free+public+indoor+volleyball+courts+near+me PDF link annotation
    • https://cdn.sqhk.co/bekutojeke/hc9KigH/xomexosolemu.pdfIn PDF document text
    • http://itnegozio.info/why_is_my_hp_envy_4512_not_printing_in_colorrbt74.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/3mjekhh/lekopaxefaxitemazuvefug.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/990834a13.pdfIn PDF document text
    • http://fajiriduxir.medianewsonline.com/bogotaja.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/instrumentos_para_la_recoleccion_de_datos_concepto.pdfIn PDF document text
    • http://topvideo.design/47329290844ye0l7.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/what_are_the_advantages_of_wind_energy_brainly.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/38289058785.pdfIn PDF document text
    • http://dapurixid.sportsontheweb.net/toshiba_lcd_colour_tv_32_inch.pdfIn PDF document text
    • https://cdn.sqhk.co/kolusugego/dKCigfQ/nituze.pdfIn PDF document text
    • http://desokore.medianewsonline.com/blood_bowl_death_zone_2.pdfIn PDF document text
    • https://cdn.sqhk.co/xivomojuf/jdjbECB/wikimed_wikipedia_medical_offline_for_windows.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/0Spgjih/w3schools_c_structures.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/nXnihhR/74682057480.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/idiiakD/kill_the_dictator_full_movie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://liraperuwuw.atwebpages.com/28795800893.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/t_shirt_sewing_pattern_free_download.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/self_dependent_synonyms_in_hindi.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_off0000e52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52B 5476 bytes
SHA-256: 66dfd5954dc4b5f63d0d622aee0ff6ed3427237d7608cc9582b1cfb6a54eeb54
font_01_sfnt_off0000f7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 10148 bytes
SHA-256: d09f8e15251052c2cf3561555f32c6cc4c84c27cd41a36d0f0446797cc14ad0c

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