Malicious PDF — malware analysis report

Static analysis result for SHA-256 91cc960804df3f99…

MALICIOUS

PDF

79.7 KB Created: 2021-03-25 15:58:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c8edb09dd18a116581f0a3735000fc33 SHA-1: 60bd7a7a1d0285724e6801e97a7317e678fd553c SHA-256: 91cc960804df3f99703c0de597cbcf303b4c0a219a9479cb48724288c73634ff
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by heuristics as a potential phishing or malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/award?keyword=how+to+promote+ethical+behavior+in+the+workplace+pdf PDF link annotation
    • http://zovanatul.iblogger.org/jijuwefimopenokoranomos.pdfIn PDF document text
    • http://butojaxutaj.22web.org/oxidation_of_odd_chain_fatty_acids.pdfIn PDF document text
    • http://xilatotes.sportsontheweb.net/what_is_puerto_rican_food_called.pdfIn PDF document text
    • http://midesamipazizuj.scienceontheweb.net/29633442750.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/mokuwanibof/delejewabiledipekevez.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/xonapa.pdfIn PDF document text
    • http://rakixufemagotut.atwebpages.com/47338602909.pdfIn PDF document text
    • http://lukafimagog.atwebpages.com/wununurikebe.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/13150175891.pdfIn PDF document text
    • http://zarazemudaseri.epizy.com/chaffoteaux_pigma_green_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/imperator_rome_carthage_guide.pdfIn PDF document text
    • http://maxuzenikofi.epizy.com/american_standard_furnace_fast_blinking_red_light.pdfIn PDF document text
    • http://pomukipokap.epizy.com/rulaginukomudovebu.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/.pdfIn PDF document text
    • http://diwisowaf.rf.gd/libros_sobre_el_alcoholismo.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/xasanuvojonezigijovek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ea18c48-53e9-4a69-ae58-9e4e5518a239/mantis_cultivator_parts.pdfIn PDF document text
    • http://roxewew.epizy.com/fidepujijowa.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/87372226256.pdfIn PDF document text
    • http://zudozam.epizy.com/aids_full_form_in_bengali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a5f5012-df4f-4d27-bc39-a3995d8cb53b/93932430125.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/60304869950.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/bible_concordance_app_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4111bb6a-9d0e-47a8-8f1e-d602910508ef/the_disaster_artist_cast_vs_real.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_off0000f4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AC 5532 bytes
SHA-256: dd0d85de4bdcacd7121b05cd66c293d9b7bc2426cca7daf1cea9e6e87776d86b
font_01_sfnt_off00010766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10766 12284 bytes
SHA-256: 466373b16b16ae6d1600b708420feaf4bbd6081c5d109c69736bec31fb21fa27

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