Malicious PDF — malware analysis report

Static analysis result for SHA-256 f46478e550cdca63…

MALICIOUS

PDF

88.4 KB Created: 2021-02-18 06:03:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 8a46cf8eb16bc2572287175c33ff149c SHA-1: 5c8634841fa03be8e1edce39c61136ff910aa594 SHA-256: f46478e550cdca63546ea74ad3d12394d82bba981b542b3cee4fcc5b09d23e7d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a characteristic of link farms used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=unwind+by+neal+shusterman+summary PDF link annotation
    • http://xuxoxobu.iblogger.org/56302253254.pdfIn PDF document text
    • https://zugasunisozabij.weebly.com/uploads/1/3/4/7/134759734/4d2735.pdfIn PDF document text
    • http://zazuvivilug.iblogger.org/fuwatarowobemafi.pdfIn PDF document text
    • http://tekabufoj.22web.org/career_aspirations_answers.pdfIn PDF document text
    • http://universe1.space/ejercicios_tiro_parabolicodhfey.pdfIn PDF document text
    • https://cdn.sqhk.co/jatizaru/giZifZJ/electric_guitar_brands_beginning_with_s.pdfIn PDF document text
    • http://auto-agents.space/comparar_dos_celdas_en_excel_y_devolver_un_valor_vbadmqvt.pdfIn PDF document text
    • http://pek-24.cc/rifiritimulis0iip.pdfIn PDF document text
    • http://wavarev.22web.org/bike_race_mod_apk_for_android.pdfIn PDF document text
    • https://togazozaxezux.weebly.com/uploads/1/3/1/6/131606461/7615196.pdfIn PDF document text
    • https://komibaxes.weebly.com/uploads/1/3/1/6/131606619/55db90623f.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/7992110.pdfIn PDF document text
    • http://skidki-day.shop/divobuwugekorin24n38.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/kagedatabujo/64514795024.pdfIn PDF document text
    • http://wewepov.rf.gd/vasegel.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/binomial_theorem_explained.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/9413147186.pdfIn PDF document text
    • http://zasufogokalo.rf.gd/betfair_poker_mac.pdfIn PDF document text
    • http://lotapit.epizy.com/blur_game_xbox_360_iso.pdfIn PDF document text
    • http://xegunapajom.epizy.com/1517388700.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_off00011cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB1 5392 bytes
SHA-256: a9a73107168517aaae9a54a6ed67b143faa6464c363f312386abe584721a4d9a
font_01_sfnt_off00012ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE9 10828 bytes
SHA-256: ccf4452f63e58794cb4c455093d452e1143f3548499523cd0ce1d2ae1d50c78e

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