Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7b2e38bbfafc6c…

MALICIOUS

PDF

88.0 KB Created: 2021-03-22 12:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 204485667a3b5a71dbf5a1fd02ed5469 SHA-1: b0e1a9d0400de86b624c4cb6807ff085d3e68fd4 SHA-256: ee7b2e38bbfafc6c1ea25073935b5ebd42801fae9a20e305ee45981c1e544943
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many of which are likely part of a link farm designed to obscure malicious destinations. The primary malicious URL identified is https://jumiwimov.ru/aws?utm_term=lg+inverter+direct+drive+washer+dryer+user+manual, which is likely used for phishing or to serve further malicious content. The document's structure and embedded links suggest an attempt to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://jumiwimov.ru/aws?utm_term=lg+inverter+direct+drive+washer+dryer+user+manual
    • http://zefujixa.mywebcommunity.org/36893269875.pdf
    • http://pewujok.mypressonline.com/20296352448.pdf
    • http://faripofijukevom.mywebcommunity.org/how_to_use_devacurl_light_defining_gel.pdf
    • https://uploads.strikinglycdn.co
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_d506896ac3624f61bac13f0d7f9b7833.pdf?index=true
    • https://uploads.strikinglycdn.com/files/124a43aa-d10d-4fce-8137-41da9f4ed5b7/p90x_schedule_download.pdf
    • https://uploads.strikinglycdn.com/files/e691c39b-da41-41c0-b008-b386cf827590/is_the_movie_after_on_netflix_based_on_a_book.pdf
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_eff3493278fb42bc91e5360629aca65e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f3868118-48eb-4204-97a4-22e9b8d21783/the_pilgrims_progress_book_value.pdf
    • http://dowinoxerirud.epizy.com/how_to_create_process_flow_chart_in_powerpoint.pdf
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_31bb94b08ccd42e48e452cf5b6553fee.pdf?index=true
    • http://bisanake.rf.gd/le_marxisme_et_la_religion.pdf
    • http://sifebitufol.onlinewebshop.net/ximebubivopuxo.pdf
    • https://uploads.strikinglycdn.com/files/5cb952ab-d188-4fb6-bc22-b38fb25a2046/night_owl_security_camera_customer_service.pdf
    • https://uploads.strikinglycdn.com/files/b8049fc9-ca0a-4709-bd84-e012ccfd6d06/gifovudafizedivekoxaja.pdf
    • https://uploads.strikinglycdn.com/files/6da29b15-dc66-4fff-bacb-2dd2e6b82398/70413618291.pdf
    • https://uploads.strikinglycdn.com/files/edfe4bd4-bd99-47f6-875f-f4f8b9a24e90/nj_residential_lease_renewal_agreement.pdf
    • http://rodesodekisivu.rf.gd/66120876080.pdf
    • https://uploads.strikinglycdn.com/files/cf688607-9f35-465c-94fa-f399b440060f/kenmore_elite_27_microwave_oven_combo.pdf
    • http://pugapugene.rf.gd/difference_between_flat_slab_and_solid_slab.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c98.bin
5ca94511a1947b45e216047829903b8ba6c7140891b2096daa49c3c519ffd142		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C98 5320 bytes
font_01_sfnt_off00011e98.bin
d93048c0d26e18431d31feea0a25b39435c6eeb4e3b699b45b1bc51d68defd8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E98 11124 bytes
font_02_sfnt_off0001445c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1445C 4324 bytes

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