Malicious PDF — malware analysis report

Static analysis result for SHA-256 96976e8d989e2d4b…

MALICIOUS

PDF

63.8 KB Created: 2021-01-30 07:20:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 27495a9761a80c29c6f19f4929b38c95 SHA-1: e3dfcebd8f63cf26117c13e06c9a1116bd656ec6 SHA-256: 96976e8d989e2d4bc4073363279f6065529e704e784cd125c420077fe482b18b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

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/aws?utm_term=identifying+descriptive+adjectives+worksheets+pdf PDF link annotation
    • https://cdn.sqhk.co/besiwowegin/wjajghj/tuvumelalal.pdfIn PDF document text
    • http://oneshops.space/download_full_english_dictionaryse252.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiziluda/9Zifiet/impossible_train_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/gadakoferupa/bjdlRhb/car_driving_games_online_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/dosojegomugu/Jgg3q7N/apk_wedding_cake_maker_games.pdfIn PDF document text
    • http://makedctl.site/77404976424zk3p4.pdfIn PDF document text
    • http://okrasote.info/linemans_and_cablemans_handbook_eleventh_editiontp06x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nujafosedoke.epizy.com/kakonajaxuvojirowokimiki.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/vukozilifajobe.pdfIn PDF document text
    • http://vipukexevuwe.epizy.com/70039240609.pdfIn PDF document text
    • http://lisiguzaxupego.epizy.com/fumonosukipe.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/ribefarani.pdfIn PDF document text
    • http://latosenepodukum.rf.gd/brocade_firmware_ftp_path.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/d_s_l_r_ki_full_form.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_off0000be57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE57 5716 bytes
SHA-256: 2222394a2720e369a0af0d9a0081a50d733e8348ea5bececf9db16d5a1b9c5d7
font_01_sfnt_off0000d1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F9 9484 bytes
SHA-256: 9564c04fdc9d6391fdbcbf94c9088c194e7f9b258455cc3704db98f42f984ea2

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