Malicious PDF — malware analysis report

Static analysis result for SHA-256 4092f269881a75c0…

MALICIOUS

PDF

73.2 KB Created: 2021-02-16 19:59:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7b82c790cf046b2af4819697afcf4a10 SHA-1: a097ac49dbfab75a1ec841a03b2c6b1d574bf035 SHA-256: 4092f269881a75c0cf02a9312f8f81f1ce4e4c29be230e5c72aa49ca7fb0b745
126 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high probability of maliciousness. The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious content. The presence of these URLs suggests an attempt to trick users into downloading further malware or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=windows+8.1+user+manual+pdf+download PDF link annotation
    • http://flowerport.store/rocket_stove_mass_heater_plansyu1y6.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupesiparu/aihujey/online_recharge_airtel_sri_lanka.pdfIn PDF document text
    • http://damokemibojer.iblogger.org/dabakuxuzomalu.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/f8hkfjb/kazitesemovoliralowiwem.pdfIn PDF document text
    • https://cdn.sqhk.co/moradivovep/18chcje/podufavemawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453902/normal_60275a5221929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495387/normal_602403a93c112.pdfIn PDF document text
    • http://fowirunuwajuk.iblogger.org/event_planner_agreement_template.pdfIn PDF document text
    • http://buloshnaya.site/x_plane_flight_simulator_apkpureeloxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495837/normal_5fc7e78924e86.pdfIn PDF document text
    • http://ludshop.xyz/pupidabagesa48udu.pdfIn PDF document text
    • https://cdn.sqhk.co/firumefetev/iic2Cgf/2020_nfl_fantasy_football_rb_sleepers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474999/normal_6028e26d2d82b.pdfIn PDF document text
    • https://cdn.sqhk.co/jipazebej/jcXijKC/82436102495.pdfIn PDF document text
    • http://rasejili.22web.org/jodezijoboporek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387715/normal_5fd065c86efde.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jimakobogugiwa.epizy.com/free_full_album_websites.pdfIn PDF document text
    • http://vosimamasi.epizy.com/lufarududiwesezajapadaw.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_off0000e055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE055 5572 bytes
SHA-256: cb089b3a22af34363cc6a068642aa56d509c97207648fe2927146b7182ed160a
font_01_sfnt_off0000f357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF357 10772 bytes
SHA-256: 9ec1bb2d16d554a759892a47e4e57f2426bd8c5c631fa4c82c41c5be5325e49a

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