Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4d8e026d751ecf3…

MALICIOUS

PDF

79.8 KB Created: 2021-03-21 02:37:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7b60384d7fe42ab52d5cb162cdc0ab2 SHA-1: 72fe8c8118676f07342a40d5a6553460052c68ae SHA-256: b4d8e026d751ecf317fbdf2a8f410e61091f7acf0a52e309de2e10160ee50e9c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body contains a URL that appears to be a lure, suggesting a phishing attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the overall detection profile strongly indicate a malicious document designed to redirect users to a potentially harmful site.

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://maypoin.ru/wix?keyword=best+weapons+for+escalation+protocol
    • http://qlemelest.online/libro_yoga_en_casa_gratis1i8kn.pdf
    • http://tijudiwulewanuw.getenjoyment.net/powilefid.pdf
    • http://rikafitamedad.medianewsonline.com/lononuvivaxigiterove.pdf
    • http://rumepado.mypressonline.com/wemijolisadilibigidut.pdf
    • http://lalashoppen.online/46421808706k5h1o.pdf
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/xosixezugedaxe.pdf
    • https://zusonugen.weebly.com/uploads/1/3/5/3/135305237/gumamuvofotu.pdf
    • http://geloritiveda.mygamesonline.org/dewalt_734_dust_hood.pdf
    • https://gapidekejoz.weebly.com/uploads/1/3/4/8/134876705/tilezo.pdf
    • http://vavoferidedodif.66ghz.com/xewumogosojobebopurer.pdf
    • http://xolokukifimiv.sportsontheweb.net/zavoputeropojirobiw.pdf
    • http://webpost.pro/kerala_boat_race_song8shf1.pdf
    • http://eushopvmn.site/pegasus_faucets_official_websitebgbdg.pdf
    • http://alexsaf.ru/cooks_essentials_electric_pressure_cooker_replacement_partsr30y6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bototiluwoge.atwebpages.com/14541119161.pdf
    • http://labapok.rf.gd/davuzatojopowigudozora.pdf
    • http://nakixaxev.myartsonline.com/daledexupabid.pdf
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_6d98680a9b18492b98612a83d981336f.pdf?index=true
    • http://nivuzujanux.myartsonline.com/boy_baby_names_in_tamil_free_download.pdf
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_25bd2bcfe4b74337b60854e5992c61f3.pdf?index=true
    • https://058da8ce-bb30-4b8c-81eb-8903018cac65.filesusr.com/ugd/ab745b_add206e6a0664d40ab70131db000021b.pdf?index=true
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_c10e92711b59496f8314999841d5c1d0.pdf?index=true
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_d57aae27046b46ab9ed7b77063c35a07.pdf?index=true
    • 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_off0000f774.bin
142ab151eb856a06d6d365d8378e3deb4cd8ada7d5d5a6d7808dd45064205b8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF774 5152 bytes
font_01_sfnt_off00010922.bin
6a4e060c736ed40a0302dc4c9d731d2235212fd4349a93b509d78fb2243274c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10922 11332 bytes

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