Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa995d2d553d640…

MALICIOUS

PDF

70.6 KB Created: 2021-02-27 21:21:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e583bfb677d0d13b2295f8db557e7485 SHA-1: 9d326066a6f96d32a4f975f311b1d1267277e2a5 SHA-256: 2aa995d2d553d640ee2c26dd02986661ea204da0746fb43e7ddc73ad6f6406b9
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to disposable domains, many of which are flagged as link farms or potentially malicious. The 'SE_LOLBIN_RUN_COMMAND' heuristic suggests the document may attempt to execute commands, possibly via embedded JavaScript, to download and run further payloads. ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent.

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://pelibifir.ru/strik?utm_term=whirlpool+cabrio+washer+error+codes+ld PDF link annotation
    • https://nililuwuta.weebly.com/uploads/1/3/0/7/130775375/simakusituxe-rukelunogi.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/honda_civic_hybrid_repair_costs.pdfIn PDF document text
    • http://webdefilmizle.com/show_hidden_objects_sims_4_2019k0yn0.pdfIn PDF document text
    • http://gonimuliveza.22web.org/beautiful_rose_bouquet_images_free.pdfIn PDF document text
    • http://study-english-05.site/windows_10_powershell_ls_commande0q2q.pdfIn PDF document text
    • http://dunotap.iblogger.org/wijomitu.pdfIn macro / runtime command snippet
    • https://papukelub.weebly.com/uploads/1/3/4/6/134666119/zofafam_jajigipuvovode_vobunelupafuz_vumaguwekoxux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408862/normal_5fe238fe96a13.pdfIn PDF document text
    • http://temilops.xyz/compound_nouns_worksheet_for_grade_5fixmk.pdfIn PDF document text
    • http://sijemogezabusa.sportsontheweb.net/dizuzawifokevimudo.pdfIn PDF document text
    • http://raxajabidadida.onlinewIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gafodix.myartsonline.com/how_to_include_public_speaking_on_resume.pdfIn PDF document text
    • http://jafuzoteneg.epizy.com/oxford_dictionary_english_to_hindi_book_download.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/33175788920.pdfIn PDF document text
    • http://kivutivepew.rf.gd/happy_birthday_gif.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/how_to_use_casio_graphing_calculator_fx-9860gii.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_off0000d6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EA 5408 bytes
SHA-256: d4b775182db67dbbb73934de5ac59eeac960ebe33cae2b2ef9e42e81227a77d0
font_01_sfnt_off0000e950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE950 10616 bytes
SHA-256: 43dac0c6d82cc13535fb33f53b84563108ab362e93c3c13a22d486b0f0421235

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