Malicious PDF — malware analysis report

Static analysis result for SHA-256 888d2ee64fb709bc…

MALICIOUS

PDF

62.7 KB Created: 2021-01-21 21:17:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9e981f3bcdd7338e14e54f94035dc013 SHA-1: 1767cacc17dae6371045879524c53139fa1378ee SHA-256: 888d2ee64fb709bcda89953275ab1bd7f0b70f208b48187af538f6d3a268d747
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a notable heuristic identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious 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://bologen.ru/123?utm_term=burger+king+foot+lettuce+script+unblocked PDF link annotation
    • https://site-1167942.mozfiles.com/files/1167942/xikazitugasige.pdfIn PDF document text
    • https://site-1171784.mozfiles.com/files/1171784/sure_shot_gun_range.pdfIn PDF document text
    • https://site-1176302.mozfiles.com/files/1176302/liporotaxukizag.pdfIn PDF document text
    • http://wavikedinufefe.iblogger.org/install_whatsapp_backup_from_icloud_to_android.pdfIn PDF document text
    • https://site-1177347.mozfiles.com/files/1177347/91569584030.pdfIn PDF document text
    • https://site-1173136.mozfiles.com/files/1173136/brand_management_online_certificate_programs.pdfIn PDF document text
    • http://dibowofu.22web.org/new_breast_cancer_staging_guidelines_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/kakumipoman/hdjegj6/17791287573.pdfIn PDF document text
    • https://site-1250438.mozfiles.com/files/1250438/refagekebixuba.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/Oiehaa9/sumizodotakofo.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/phijbgv/lexisowolofufofe.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/5Zfa5Dx/roblox_get_free_robux_hack.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/jivamubug/musobimufelagadar.pdfIn PDF document text
    • http://xivubijorudi.epizy.com/zudiwaremujizirat.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/dijolewokenaz.pdfIn PDF document text
    • http://jolasesiv.epizy.com/ant_video_er_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/sokeb.pdfIn PDF document text
    • http://xopozajuve.epizy.com/84224273244.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/berthold_formata_font_free.pdfIn PDF document text
    • http://zavipazo.epizy.com/76241802585.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_off0000b9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C2 5368 bytes
SHA-256: 9fe8e768276baf3655a70a95b2d5aa622261aa070d8c82a04d70d934845423b1
font_01_sfnt_off0000cc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC19 9816 bytes
SHA-256: ba5969df152cbfb753870e5bbb5e759aedfe671fe6f1f1a7de0a5251b3624714

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