Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d4d68c1c073476…

MALICIOUS

PDF

74.3 KB Created: 2021-03-25 15:01:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f9d132334d972a2b0632468778fda5bd SHA-1: 247400368df315fc911cafca35be0acd46cefec9 SHA-256: e8d4d68c1c0734768db2cde0c3b4ea14de241cbdf52c81356fee6fbbd58b7f8b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The document body, though partially corrupted, suggests a lure related to "Guess the logo pic answers level 1", indicating a social engineering attempt. The presence of external URIs and a link farm heuristic further supports the malicious intent of directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/strik?utm_term=guess+the+logo+pic+answers+level+1 PDF link annotation
    • http://linorusani.iblogger.org/duel_of_the_fates_trombone_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/kisudosus/cijYmhc/94301121864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425501/normal_6038d71c8e836.pdfIn PDF document text
    • https://cdn.sqhk.co/juvadujud/hhdG8Te/nidozeb.pdfIn PDF document text
    • https://cdn.sqhk.co/nawamuzimosu/hajdugc/cascading_style_sheet_in_html.pdfIn PDF document text
    • http://cashbackk.site/dusapofanevinasawubobosu28ptl.pdfIn PDF document text
    • http://rent-nout.site/13342048016csotp.pdfIn PDF document text
    • http://bovafigirom.22web.org/bbmp_property_tax_2018-_19_application_form.pdfIn PDF document text
    • http://momentikshop.space/honeywell_rth110b_not_workinglu5kx.pdfIn PDF document text
    • http://woodlesenka.ru/ley_1010_del_2006_resumenax971.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485010/normal_603d899e39212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476302/normal_604c9976b47a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420431/normal_5fed5de83a98c.pdfIn PDF document text
    • http://boviriso.22web.org/free_archicad_tutorials_for_beginners.pdfIn PDF document text
    • http://noruzugakad.22web.org/mukepudewilekiduja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tumaxokalabad.epizy.com/challenger_school_uniform_store_san_jose.pdfIn PDF document text
    • http://mivuwujat.rf.gd/android_auto_start_service_on_boot.pdfIn PDF document text
    • http://pogosib.epizy.com/24318258475.pdfIn PDF document text
    • http://tuxesoguzegisox.epizy.com/fake_caller_id_apk_dow.pdfIn PDF document text
    • http://pamiduzaluwo.epizy.com/11228065059.pdfIn PDF document text
    • http://redotikami.rf.gd/how_do_i_program_my_samsung_blu_ray_remote_to_my_tv.pdfIn PDF document text
    • http://sedijinuv.epizy.com/yahoo_aviate_launcher_apk_free.pdfIn PDF document text
    • http://tomoveko.epizy.com/84772030528.pdfIn PDF document text
    • http://tosodesuvivat.epizy.com/jufememulojuvurakox.pdfIn PDF document text
    • http://vedisupekak.epizy.com/magisterio_de_la_iglesia.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_off0000e416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE416 5428 bytes
SHA-256: 13bb83eab3a329e3efe505fddcf6ec670a114cd53d2743069a3b38ecdb78f624
font_01_sfnt_off0000f6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AC 11144 bytes
SHA-256: b7c3ebf0844d283eaa067bfef012081bbdeb4a968e8180b230ff89dfc50879af

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