Malicious PDF — malware analysis report

Static analysis result for SHA-256 e72e3ec445218bca…

MALICIOUS

PDF

80.2 KB Created: 2021-03-02 19:48:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: da8adf9b8197c038dbe21f9a3e5a830a SHA-1: 90c4ba462380b1072b5afd3f56543b505cbc07f8 SHA-256: e72e3ec445218bca306e0e6633cc17462edd673465d60a0d3781328b3e3f07c6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://midufefew.ru/strik?utm_term=english+dictionary+app+without+internet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5fd2836e26b8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503791/normal_602244519c6f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367640/normal_5ff5c0db2396d.pdfIn PDF document text
    • http://ayazshabutdinov.club/how_many_calories_in_a_subway_cookiezitln.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/what_is_importance_of_energy_conversion.pdfIn PDF document text
    • http://bufo.online/accounting_101_philippinesrjjlb.pdfIn PDF document text
    • http://dororuminaxa.mywebcommunity.org/zojameleroki.pdfIn PDF document text
    • http://sidufapas.mywebcommunity.org/meteratomedusudafelazal.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/913693637999v2ur.pdfIn PDF document text
    • http://septiki-rf.website/convoluted_universe_books_by_dolores_cannonnvgp3.pdfIn PDF document text
    • http://evromotors.net/zorawewb0rx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_6016ec7e05876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386834/normal_603bb46886c81.pdfIn PDF document text
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/dasafuruwuze-lijidasokaju-xikosu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369518/normal_5feff7cda5422.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/85ff231a7c38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405903/normal_600afe4cc26e5.pdfIn PDF document text
    • http://accueilcmb.com/competency_based_questions_for_team_leader26y9z.pdfIn PDF document text
    • http://alkostore.xyz/board_game_rules_examplesh6x9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 5368 bytes
SHA-256: af190d693901cd0a690ffbf2fb159fdc3e2a668e978be6ad28e1b163a7dfc25a
font_01_sfnt_off000100b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B0 10580 bytes
SHA-256: 5cd42c8ccdb318e38e12cb298b1c4d5d8891ddac296f26dd5f838cc4a42dc774
font_02_sfnt_off000124bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BD 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.