Malicious PDF — malware analysis report

Static analysis result for SHA-256 9deb209420c6127b…

MALICIOUS

PDF

76.1 KB Created: 2021-02-18 08:50:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 674ea8352e52ade45bd602bc9f502347 SHA-1: 82e1d855ae36c1f33f27f48ca6755e0ee7dc04cd SHA-256: 9deb209420c6127bd9659ef038846bb45abeb7f968fbd7b63f9631e69c70dc1f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The document body, though partially corrupted, indicates a lure related to educational worksheets, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=area+and+perimeter+of+composite+figures+puzzle+worksheet+answers PDF link annotation
    • http://cabinetshub.xyz/9050651361675zhv.pdfIn PDF document text
    • https://cdn.sqhk.co/lutaxudepoje/hchjgdr/jizibividatadi.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/Otjfgg2/sesisasipeperosotawojezu.pdfIn PDF document text
    • https://cdn.sqhk.co/puwipaneke/ibgf8hb/lidl_weekend_deals_ni.pdfIn PDF document text
    • http://lightly.store/gefavojitamab2uh13.pdfIn PDF document text
    • https://cdn.sqhk.co/bagudivibi/ghcMyja/68443520342.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovebakeb/2wG1jia/73517651016.pdfIn PDF document text
    • https://cdn.sqhk.co/nugofonavuf/IyOicjb/jump_paint_by_medibang.pdfIn PDF document text
    • https://cdn.sqhk.co/vakujediraw/giiaWii/xakukimuzafaretavow.pdfIn PDF document text
    • http://cabinetshub.xyz/80945832110yotea.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/haidDZD/the_bucket_list_family_cinderella_castle.pdfIn PDF document text
    • http://clobuss.ru/99374647670oqub6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489045/normal_601d643a2bfbf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zijikekiz.epizy.com/php_code_formatter_phpstorm.pdfIn PDF document text
    • http://murobalebijuge.rf.gd/meloxekoxezosewegixiv.pdfIn PDF document text
    • http://zefuxaninegug.epizy.com/susukedifak.pdfIn PDF document text
    • http://vujipopeb.rf.gd/permitted_crossword_puzzle_answers.pdfIn PDF document text
    • http://zasinuvitas.epizy.com/chinese_dictionary_free_for_pc.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_off0000e96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96E 5764 bytes
SHA-256: ad4239aa7b5d4a1cdc06ae5cdfbd2f7800d4f980f5b611602c8b97509fad33b5
font_01_sfnt_off0000fcff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFF 11108 bytes
SHA-256: 3e7fc7e626156ee22c49189a5da5a3296dca13c0389bd7d85b3c7b76256d616f

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