Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba4010bd75e4afa…

MALICIOUS

PDF

70.7 KB Created: 2021-06-05 12:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 319cbe1e72fe3d4178cc974a2f210c66 SHA-1: e2808245262d85dd40d5757c56661f293d6bb122 SHA-256: eba4010bd75e4afa4656b2abc7b24b8989c8618467dee6871fa6ced6f9cbe862
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting and link farms, indicating a likely attempt to redirect users to malicious sites. The presence of external URIs and the 'link farm' heuristic strongly suggest a phishing or malware distribution vector.

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://cructi.ru/pbw?utm_term=how+do+you+adjust+the+pressure+switch+on+an+ingersoll+rand+air+compressor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457560/normal_6043338d904fc.pdfIn PDF document text
    • https://zelasiboromur.weebly.com/uploads/1/3/1/6/131606405/tupiborakoluj-dajurina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446649/normal_601fec7ed9d6f.pdfIn PDF document text
    • https://tasuzifesuxad.weebly.com/uploads/1/3/7/5/137502252/kexej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530171/normal_5fce96be6f617.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487194/normal_5fd8b53d39908.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370265/normal_600112015e263.pdfIn PDF document text
    • https://womonejod.weebly.com/uploads/1/3/2/6/132681039/2017895.pdfIn PDF document text
    • https://peniluvemafoni.weebly.com/uploads/1/3/4/7/134705148/d3066bba340f4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418013/normal_6029e7fa1f488.pdfIn PDF document text
    • https://fojomifurinu.weebly.com/uploads/1/3/1/3/131378835/gomiz-notironokibib-wilaroji-fixite.pdfIn PDF document text
    • https://pesadosopovito.weebly.com/uploads/1/3/4/2/134235692/kenejix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493245/normal_603aca7c31bff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuranosa.pbworks.com/w/file/fetch/144412836/how_to_find_a_missing_angle_in_an_irregular_polygon.pdfIn PDF document text
    • http://bawamotijeku.pbworks.com/w/file/fetch/144446649/suzijugugu.pdfIn PDF document text
    • http://xugilip.pbworks.com/w/file/fetch/144506559/quantitative_and_analytical_reasoning_mcqs.pdfIn PDF document text
    • http://bupataved.pbworks.com/f/fafexumaxutevapovulomu.pdfIn PDF document text
    • http://kirozatijawu.pbworks.com/f/seferavejubovidu.pdfIn PDF document text
    • http://niluputevi.pbworks.com/w/file/fetch/144656052/module_4_investing_test_answer_key.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/w/file/fetch/144413559/27295611233.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_off0000d6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F2 5716 bytes
SHA-256: 35566b9c1eae37f68c4f89d489e42149fb9ecd7cad17d7ee99a9592ed9349f1f
font_01_sfnt_off0000ea59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA59 10096 bytes
SHA-256: 18275a7365eb6a4b46d36586c5413e060471a89f0ad21280854b84e06f420e62

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