Malicious PDF — malware analysis report

Static analysis result for SHA-256 30358d76954ca4eb…

MALICIOUS

PDF

73.9 KB Created: 2021-02-25 01:50:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1f11008d918fb82cba6e8cbcf5416003 SHA-1: d628bc6389a196fb02ca68a751eb3a28e5479c8d SHA-256: 30358d76954ca4eb935382528e4ede26f7797b64adc8dae2be75c304efe38a1d
166 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the presence of commands like 'curl' within the document text, which could be used to download further payloads. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/strik?utm_term=shashi+tharoor+inglorious+empire+audiobook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404299/normal_60361f309db34.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/which_processor_is_best_in_i5.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/discrete_mathematical_structures_4th_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446651/normal_6016048650fda.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/JhdLUjd/kewoletulipes.pdfIn PDF document text
    • https://cdn.sqhk.co/tomibigi/gcWigAi/lock_screen_live_wallpaper.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/streetcar_named_desire_movie_ending.pdfIn PDF document text
    • https://cdn.sqhk.co/gopuxipo/ibbiazk/virtual_races_november_2020_uk.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/piluzi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_60138ed4e9bb6.pdfIn macro / runtime command snippet
    • http://interior.estate/trane_xt500c_installation_manuala84t0.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/iPhgYLB/savine.pdfIn PDF document text
    • https://cdn.sqhk.co/nezazexador/lqVjche/kagibenowaroxojedalo.pdfIn PDF document text
    • http://mowefopovog.mywIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/melir.pdfIn PDF document text
    • http://livirava.atwebpages.com/84709455435.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/what_is_the_latest_software_update_for_kindle_fire.pdfIn PDF document text
    • http://bitines.myartsonline.com/what_does_the_curl_of_a_vector_field_represents.pdfIn PDF document text
    • http://livirava.atwebpages.com/ensayo_sobre_la_carta_a_garcia.pdfIn macro / runtime command snippet
    • 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_off0000e12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12E 5680 bytes
SHA-256: c5d1e65960d141464857dbca003ed99fc1261d18a39198326859dfc34bb9bd1e
font_01_sfnt_off0000f449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF449 11156 bytes
SHA-256: b30957f79d9cfde98910ccf3f7a7cec575f25a906e6916cca321a6ae0e12b7f8

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