Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e70e3a512e9ba8…

MALICIOUS

PDF

73.7 KB Created: 2021-03-16 17:51:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 09052adb2b94ab64eed16569c3d1a38f SHA-1: ac77b247d3f2a9f1489fabfd9809c9d7b0c95a75 SHA-256: e6e70e3a512e9ba8ec9ab9287d8056b35a4255e0a2bd69d9589271e9de4a9930
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution campaign. The presence of external URIs and the overall structure strongly suggest it's designed to redirect users to malicious sites.

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://resalured.ru/award?keyword=apertura+de+credito+pdf PDF link annotation
    • http://gimanobidetage.iblogger.org/41358080821.pdfIn PDF document text
    • https://kadeborejegan.weebly.com/uploads/1/3/2/7/132740978/dogobu.pdfIn PDF document text
    • https://fuzitadixasixo.weebly.com/uploads/1/3/1/3/131381677/pojupopotu.pdfIn PDF document text
    • https://cdn.sqhk.co/pufojoloz/AggwpfA/49468354662.pdfIn PDF document text
    • https://vesabigixovo.weebly.com/uploads/1/3/1/8/131857304/rororako-zunedaxeboruzur.pdfIn PDF document text
    • https://gisimezibeze.weebly.com/uploads/1/3/0/8/130874543/6c5d7272066.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/ia7gdgc/best_interior_design_blogs_2018.pdfIn PDF document text
    • https://vizekufebatovut.weebly.com/uploads/1/3/1/3/131382320/duwipijetelise-pifemalosob-mafajuponujodo.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/39049331764.pdfIn PDF document text
    • https://cdn.sqhk.co/tofegejij/inUsJij/91370678612.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/hhCfRAo/mogezurunejuvolekuladip.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/glxKcbD/costco_callaway_golf_balls_review.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/jjqChcG/jovon.pdfIn PDF document text
    • http://suwadebizon.mywebcommunity.org/appositive_practice.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wonenuw.epizy.com/celebration_templates_free.pdfIn PDF document text
    • http://xilavivugup.epizy.com/anaconda_windows_64.pdfIn PDF document text
    • http://vobununebufipu.rf.gd/coplanar_waveguide_and_microstrip.pdfIn PDF document text
    • http://tajiroxajesolut.atwebpages.com/rifiwilebunorip.pdfIn PDF document text
    • http://siviwogipod.epizy.com/45685654402.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_off0000e4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EB 4928 bytes
SHA-256: d40919fc061303cee2e39d76431f5568d0037eb4b8488f0666c8b50a976b0b98
font_01_sfnt_off0000f5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C2 11216 bytes
SHA-256: 0abff18fa3e8ad052043ea904986fd6da6a0957f05e4aaa452e1211dc5f3e9c5

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