Malicious PDF — malware analysis report

Static analysis result for SHA-256 18efacc365efbf8a…

MALICIOUS

PDF

86.6 KB Created: 2021-03-01 22:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 97d7e20c65f4759a4fdaad85ae04a289 SHA-1: 5bbd5e92d28c6447b7995526b095018f7bf15bda SHA-256: 18efacc365efbf8a626f7722f4ea54429a241f77bbde8b6141b79ce572e8ae86
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URLs suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/123?utm_term=railcraft+rolling+machine+not+working PDF link annotation
    • http://nipokaxa.getenjoyment.net/the_practice_station_new_berlin_wisconsin.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/Jifji0x/31323804466.pdfIn PDF document text
    • https://cdn.sqhk.co/zewezerezi/iUghLij/bimojip.pdfIn PDF document text
    • https://cdn.sqhk.co/mobirewin/ihjB1Dz/rizafop.pdfIn PDF document text
    • http://puzofogerexiwi.22web.org/abraham_hicks_guided_meditation_love.pdfIn PDF document text
    • http://xafukuxovikovu.22web.org/bachelor_of_business_information_systems_in_canada.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/latawukefisewi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wefadep/91734559038.pdfIn PDF document text
    • http://xuxerikafirin.epizy.com/management_of_endometriosis_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/halcyon_nights_ferngully_cot_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/neoplasia_maligna_de_ovario.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/59374867304.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/adjusting_journal_entries_in_quickbooks_online.pdfIn PDF document text
    • http://nezopodadas.epizy.com/65206134647.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/avatharam_song_lyrics_in_tamil.pdfIn PDF document text
    • http://forolulazo.rf.gd/89159257651.pdfIn PDF document text
    • http://risumipekalur.rf.gd/free_driver_canon_ip1800.pdfIn PDF document text
    • http://zuwewabarabin.epizy.com/mcdougal_littell_geometry_2007_online_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/21948508582.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_off00011625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11625 5280 bytes
SHA-256: 8e658c6659bfe41c6ffcea9766065fb6bbf40f633f1bffa8e73e317d1e178400
font_01_sfnt_off0001280d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280D 10888 bytes
SHA-256: 13d6e79e2106b2cdd6d660388b2eedaf6885088e5c4155af762d1cd19d89c3ad

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