Malicious PDF — malware analysis report

Static analysis result for SHA-256 727de5b93a4a9178…

MALICIOUS

PDF

93.1 KB Created: 2021-03-18 07:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 95d7aaea27a531f5c8f6704937afcbf0 SHA-1: 253775fa16f63016a5daafd19d9bde5c4180c9f5 SHA-256: 727de5b93a4a91789d2f9694c59159cdf6b9a2374011b727455f1ec1121b4f32
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, with one pointing to a suspicious domain 'druttle.ru' and another to 'cdn.sqhk.co', suggesting a link farm or phishing attempt. The document body is heavily obfuscated, but the presence of many external links indicates an intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=nostalgia+snow+cone+maker+parts PDF link annotation
    • https://cdn.sqhk.co/kivipemo/gciihgY/luzelak.pdfIn PDF document text
    • http://telgrm.site/739997371022ejf2.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/Z7kxDG5/mr_bowens_chicken.pdfIn PDF document text
    • http://waystep.site/337110553196zbub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493209/normal_5fd2ff115ade7.pdfIn PDF document text
    • http://form-copyrightservices.com/project_manager_jobs_remotemmk51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481828/normal_604d76188f11f.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/71680355972.pdfIn PDF document text
    • http://timelessdecorum.com/wujunezuwulototapaganuikg8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446168/normal_5ff6d111cc275.pdfIn PDF document text
    • http://gejurabek.getenjoyment.net/qasida_burdah_transliteration.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/z9bQggi/transparent_screen_printing_ink.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_a6ade0d0ce51429f845989f74106a487.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09037355-deec-48b1-9150-3d79b817ba1e/manual_canon_650d_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12fd5feb-66f4-447c-b253-cfbb78deb267/zizexunoruseligup.pdfIn PDF document text
    • https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_739f947cf3984e9d8c2f9e455c5eefe1.pdf?index=trueIn PDF document text
    • https://c09438b0-f1cf-4ade-afa2-d322e048c450.filesusr.com/ugd/313cc6_e5f2cb6e20c94211b996c126c20e84e7.pdf?index=trueIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_ff0ca88036e34115b1b9cb3561fd3727.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb035284-cc8d-4e9e-aab3-df0eb0f1eda5/what_is_the_best_bread_machine_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50079c86-41a6-4098-9923-ec7c52c95a1a/87360669082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40b0b498-b027-42ff-9dee-9169330a1fcf/crysis_3_trke_yama_indir_gezginler.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_off00012823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12823 5380 bytes
SHA-256: 9189b40d5325504df4f35db4934fe238dae1940fdfa2d083161d04353efe9af4
font_01_sfnt_off00013a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A76 13720 bytes
SHA-256: cb44e32674d34a6a8f866c0a41210b11800d626d8a500b1bc670243ecf65511b

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