Malicious PDF — malware analysis report

Static analysis result for SHA-256 80be88dbbcedea1d…

MALICIOUS

PDF

75.3 KB Created: 2021-02-04 23:01:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2e6eca0cab64f26676d2d0d9936c8c94 SHA-1: d4172fdcff1a685b332de2b8bffe295a3fcaa734 SHA-256: 80be88dbbcedea1de91a173b2d73ab2537cad5973f5c44bd328f1292d7c1825a
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with a notable one pointing to 'bologen.ru', suggesting a redirection or phishing attempt. The presence of embedded URLs and the 'link farm' heuristic indicate an effort to direct users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wb?keyword=air%20cadets%20uniform PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380073/normal_5fd61899025d2.pdfIn PDF document text
    • https://cdn.sqhk.co/juputufom/aiaehg0/classic_halloween_movies_for_kids.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387573/normal_5fd8b1955ae8c.pdfIn PDF document text
    • http://domavera.ru/amazon_music_download_purchased_songsz1jum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413976/normal_601b7b1bc9a9f.pdfIn PDF document text
    • http://small-italy.space/kuzey_gney_dizi_indirxwlto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421056/normal_5fc78ca973e30.pdfIn PDF document text
    • https://cdn.sqhk.co/novigigexuxo/fdriaie/lethargy_in_cats.pdfIn PDF document text
    • http://nout-prokat.website/astrologian_rotation_guidejl6ts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477181/normal_5fdacc865d024.pdfIn PDF document text
    • http://prognoz-football.club/planos_de_portones_levadizos_manualesi9kv1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390330/normal_5fdd90f795464.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/hgjihcf/gujirededazeleninuxinavuv.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/netinuwa/18777626301.pdfIn PDF document text
    • http://peregal.epizy.com/chitralahari_songs_video.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/zozupobizep.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/android_store_private_key.pdfIn PDF document text
    • http://sobakijej.rf.gd/82674302931.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/fubonerusedadixipi.pdfIn PDF document text
    • http://lukoleni.epizy.com/tixonenalizobikomibopisaj.pdfIn PDF document text
    • http://weketabafizevu.epizy.com/dasunivoxitaxisajaj.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/15370602449.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_off0000e773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE773 5124 bytes
SHA-256: 44fed2d06b7c1ea17b0225485f667717a4fe5c239ccb331eab9e6a02829a824c
font_01_sfnt_off0000f8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CD 12304 bytes
SHA-256: 188c352e817326574d2ec24442bf59e13ecfde0c94f6162c833aeb84e7f5ef8a

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