Malicious PDF — malware analysis report

Static analysis result for SHA-256 babe7f55f52713bd…

MALICIOUS

PDF

71.5 KB Created: 2021-03-31 16:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ede8920ca9a4b6db6277859218d4081e SHA-1: af8d45c6b260e7814522172c80470dc8a4b795b3 SHA-256: babe7f55f52713bdde4a438b051da7aa4cd3a444cf7030e42b44721fa6fd92e9
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm designed to direct users to malicious or spam content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the PDF's structure point towards an attempt to exploit search engine optimization techniques to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=origami+flower+bouquet+youtube PDF link annotation
    • https://cdn.sqhk.co/losokifape/Tghshge/marktplaats_app_downloaden_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/vozogekom/hgFrkge/vehicle_suspension_system.pdfIn PDF document text
    • https://fanejutasoja.weebly.com/uploads/1/3/5/3/135399707/vavogek_liditu_nutizop_jobelutulewine.pdfIn PDF document text
    • https://cdn.sqhk.co/furikute/jgBjAhg/android_studio_sdk_location_ubuntu.pdfIn PDF document text
    • https://zetogamoxaten.weebly.com/uploads/1/3/4/6/134698061/jeboketakunip_xizepinif_kapafewinufe_pudebudax.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/Pgg8Zha/1645712023.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/jhbrhja/65013558508.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/jf7cjd6/knights_of_europe_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rudurugineme.epizy.com/o_saki_saki_song_mp4.pdfIn PDF document text
    • http://pinijinubeseza.rf.gd/73702603049.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/loris_karius_stats_clean_sheets.pdfIn PDF document text
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_4325642c456f47c69ac62d15e09765b5.pdf?index=trueIn PDF document text
    • https://559ef5b4-38f4-491c-95f5-a6f57f0534fb.filesusr.com/ugd/1b862a_2a0e212b0ec6484d806f268601264cb8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sabegokek/a_smarter_way_to_learn_python_learn_it_faster._remember_it_longer.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/47837714316.pdfIn PDF document text
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_23adfde831604a00a7828854cbff268e.pdf?index=trueIn PDF document text
    • http://kanoduluzoxa.epizy.com/99127862331.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/64423253969.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_off0000dbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF3 5396 bytes
SHA-256: cc572540cbaf9151f6824b96e01ee6ced1a0d5dea57a5ba0d79de326ea2f936e
font_01_sfnt_off0000ee4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4F 10156 bytes
SHA-256: 331484a6b8f541914c1758b59c14743c82d9638ec52854d4cde81c5f33a51eb0

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