Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a127de6c8da4c79…

MALICIOUS

PDF

74.9 KB Created: 2021-03-28 15:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a19960cb4cfcd6d5e97d0bc7f08d0376 SHA-1: 274905d1823d80b4425018b444c2641394deb923 SHA-256: 6a127de6c8da4c7974c418a7da0360a769e5afe04370db4166e76a60aea049ac
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating the presence of external URIs and is flagged by a machine learning classifier and ClamAV as malicious. The embedded URL, 'https://dafemum.ru/strik?utm_term=how+to+set+an+rca+universal+remote+control', suggests a phishing or social engineering lure. Although no scripts were explicitly extracted, the PDF structure and the nature of the embedded URI strongly suggest it's designed to redirect users to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/strik?utm_term=how+to+set+an+rca+universal+remote+control
    • https://cdn.sqhk.co/badiwugaleko/gegcfhc/87826577327.pdf
    • http://kimujedat.mygamesonline.org/classroom_management_in_urdu.pdf
    • http://daludaja.getenjoyment.net/seluta.pdf
    • https://cdn.sqhk.co/sifomujotaxa/ibetUge/super_android_13_xenoverse_2.pdf
    • https://cdn.sqhk.co/sabumijobude/gjjNhBx/18985207913.pdf
    • http://jerunuju.mypressonline.com/43322473284.pdf
    • http://kunepuvobimamin.medianewsonline.com/convert_ms_word_document_into_online.pdf
    • https://cdn.sqhk.co/fafojipedul/2Uhieic/mabur.pdf
    • https://cdn.sqhk.co/togodawexu/vgihgdE/30390663834.pdf
    • https://cdn.sqhk.co/kisilusotuke/ldL63N0/54249529386.pdf
    • http://pedaxofanor.mywebcommunity.org/beyond_belief_josh_hamilton.pdf
    • http://kafujaguvo.mygamesonline.org/33269380553.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a510222a-f041-4c25-aefa-41c7e5d3fc07/steve_jobs_net_worth_2019_forbes.pdf
    • https://s3.amazonaws.com/nuselufuzo/74695759452.pdf
    • http://kivozusemu.atwebpages.com/45992905964.pdf
    • https://uploads.strikinglycdn.com/files/e42f437c-e887-4a35-98fd-e93a27a62e92/67358109168.pdf
    • https://s3.amazonaws.com/zatasipezeg/noma_825_snowblower_manual.pdf
    • https://uploads.strikinglycdn.com/files/0abfc97c-8a66-468d-a64f-ba1888e70fc9/95327105099.pdf
    • https://uploads.strikinglycdn.com/files/4a6cc355-f040-4f78-91bb-169385a29ca9/ginijerorow.pdf
    • https://s3.amazonaws.com/sogovekevi/historical_data_bse.pdf
    • https://s3.amazonaws.com/belopudevuzuza/balak_palak_marathi_movie_video_song.pdf
    • http://dipagepe.atwebpages.com/90575766559.pdf
    • http://rixigor.onlinewebshop.net/ncert_maths_book_class_5_solutions_free_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e79c.bin
a11342eab37937351044d2d575b4c5273464691e5b45e85f6b4b7c9e0dba0d5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE79C 5060 bytes
font_01_sfnt_off0000f8d0.bin
de6b66ddcc4dc6e2647917f1c2f21216e899fc46ceb6aeafa6d55e02604fc204		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D0 10824 bytes

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