Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d59cf34601ee91c…

MALICIOUS

PDF

205.0 KB Created: 2021-03-18 00:12:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 048ddd3388ed120a018bf0ff18615cc4 SHA-1: dc6f242189a22fd24fa48574104274d63bd94e75 SHA-256: 3d59cf34601ee91cdac0b42515364644ed96a18289e317e0f1b30842ea9f6004
136 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. It contains an embedded URL that masquerades as a BBC learning English resource, likely to trick users into visiting a malicious site. The presence of 'cmd.pdf' and related URLs in the document text suggests an attempt to execute commands or download further payloads, aligning with common phishing and malware delivery techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 5

  • 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://botokaw.ru/123?utm_term=bbc+learning+english+6+minute+vocabulary PDF link annotation
    • http://rajajime.mypressonline.com/69596175767.pdfIn PDF document text
    • https://vuxofuta.weebly.com/uploads/1/3/4/2/134235669/2366575df.pdfIn PDF document text
    • https://bivixogerixud.weebly.com/uploads/1/3/4/4/134469213/sonigebulugodow-fekogito.pdfIn PDF document text
    • https://takewinedol.weebly.com/uploads/1/3/4/7/134768260/soviturugodigetil.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/newisit.pdfIn PDF document text
    • https://mekupefaju.weebly.com/uploads/1/3/5/3/135316310/bimabalizomenaxa.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/6979627.pdfIn PDF document text
    • https://xemageka.weebly.com/uploads/1/3/1/3/131380316/7279093.pdfIn PDF document text
    • http://jususozosowi.22web.org/litekaro.pdfIn PDF document text
    • http://lamisorosasam.mywebcommunity.org/leadership_management_and_team_working_in_nursing.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/bankers_adda_static_gk_capsule_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxunarin.epizy.com/how_to_change_gateway_ip_using_cmd.pdfIn PDF document text
    • http://puwolir.epizy.com/coliformes_totales_y_termotolerantes_en_agua.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd935ba-c7c3-48b6-818e-630257b6b197/19472801204.pdfIn macro / runtime command snippet
    • https://uploads.strikinglycdn.com/files/27901d85-c4c7-45bf-b501-66480e75426d/naximeriwules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92900d5e-6ad4-46b1-ad58-54000ea49ee0/sekikapizale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34aff03f-53d9-4f29-94ac-9fe537da778b/politics_of_jesus_obery_hendricks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c6c4dab-6adb-4789-ad58-8e3ad1375bbd/audi_s4_avant_occasion_suisse.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://puwolir.epizy.com/coliformes_totales_y_termotIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002ec2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC2D 5720 bytes
SHA-256: b138068b8000046f08acf317bee6f5e12ad12d8a23ea7905350c0128c08d47f7
font_01_sfnt_off0002ff88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF88 11476 bytes
SHA-256: 0240a9ffb086415fb18873deca5820ef93478fdc80a424f2f43b75998e91e5bf

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