Malicious PDF — malware analysis report

Static analysis result for SHA-256 deefdddc2eabe106…

MALICIOUS

PDF

85.9 KB Created: 2021-02-25 06:32:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cd603159900fab9365ecf10f08cc57c2 SHA-1: 4ca48c6b7c5a6b0fb253bc19eac9aaef84bc16e0 SHA-256: deefdddc2eabe10682bf89631f268982ba2a3c4c9cb21f9c391755a4319f4400
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The PDF_URI heuristic points to a URL that appears to be a lure for phishing or malware distribution. While no scripts were directly extracted, the presence of numerous external links and the overall detection suggest the document is designed to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://maypoin.ru/award?keyword=cateye+wireless+manual+strada PDF link annotation
    • https://cdn.sqhk.co/wadupaxi/fhfezJu/68320314552.pdfIn PDF document text
    • https://cdn.sqhk.co/vogidasobe/ijii7Xf/emperor_and_beauties_game_mod_apk.pdfIn PDF document text
    • http://jofufuzutaki.22web.org/gukoxiz.pdfIn PDF document text
    • http://metinozub.iblogger.org/nujopafotalubizivemowexax.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/troy-bilt_27_ton_log_splitter_parts_diagram.pdfIn PDF document text
    • http://bivemipizejon.22web.org/maluxozabidatanov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zaxukesaludu.epizy.com/psalm_23_kjv_bible_hub.pdfIn PDF document text
    • http://zararogesa.epizy.com/nis_directive_compliance_guide.pdfIn PDF document text
    • http://beritoka.rf.gd/pronoun_antecedent_practice.pdfIn PDF document text
    • http://radagosedapisat.epizy.com/a_day_pension_reforms.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/master_service_agreement_amendment_template.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/what_are_biological_factors.pdfIn PDF document text
    • http://kebugitop.epizy.com/coliformes_termotolerantes_en_aguas_residuales.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/nevumidaz.pdfIn PDF document text
    • http://nalosig.rf.gd/50007567871.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/chennai_express_full_movie_mp4_free.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/livros_em_ingles_infantil_para_baixar.pdfIn 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_off00011c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C17 5068 bytes
SHA-256: 2dd7ff605a28f4437d31fff64dd0bb0e40eb3013dfadaf2bdad26fe3e3d25784
font_01_sfnt_off00012d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4E 10476 bytes
SHA-256: ebdf5980c05d6aa94c8051fd8adcefd7bbbb401bf8c96d8324261a94673b901f

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