Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e41a8e519e6d98…

MALICIOUS

PDF

97.7 KB Created: 2021-03-31 14:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fef3db2a282f8512be02b2e28d88296 SHA-1: bd3a04ccf7b120802f549c05b50d4cc028e878e3 SHA-256: b9e41a8e519e6d98847fe307bc505b66da6042e8b2a2d7ee03a6230897319c1d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains an embedded URI pointing to a suspicious domain, suggesting it's part of a link farm or phishing campaign. The document body, though heavily obfuscated, appears to be a lure related to "The Crown" TV series to drive traffic to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/strik?utm_term=the+crown+cast+season+2+jackie+kennedy
    • https://dibalinelig.weebly.com/uploads/1/3/1/3/131380687/gobazota.pdf
    • http://guditoresuz.22web.org/13847107457.pdf
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/vofelizafulil-bipuwemubov.pdf
    • https://cdn.sqhk.co/mibemofega/Nggr4je/wikuwezutitilipajajofutep.pdf
    • https://cdn.sqhk.co/podoxato/hf8ahaH/kibemigok.pdf
    • http://vutezokikunix.iblogger.org/70499706413.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/deaba032-c0cf-4266-bc39-cb4b406cef08/ferrari_testarossa_engine_oil.pdf
    • https://s3.amazonaws.com/pusolefosex/reasons_school_uniforms_are_bad.pdf
    • https://uploads.strikinglycdn.com/files/6e695813-5813-4a78-8c28-e84b2b6ed715/franz_bardon_initiation_into_hermetics.pdf
    • http://zodexalanokaxaj.rf.gd/samsung_wa422prhdwr_aa_wont_spin.pdf
    • https://s3.amazonaws.com/woxotopapozokev/apush_chapter_11_test_answers.pdf
    • http://fivasire.rf.gd/chrysler_town_and_country_2006_manual.pdf
    • https://uploads.strikinglycdn.com/files/c48f61c3-9679-49ca-b9e8-e2df8759b14e/komupapasovawetomuron.pdf
    • https://s3.amazonaws.com/xenavuxa/suzonisijomuji.pdf
    • https://s3.amazonaws.com/susonanezaj/workout_plan_to_build_muscle.pdf
    • http://fizaveloxuraje.rf.gd/24579582404.pdf
    • https://uploads.strikinglycdn.com/files/6e9a9953-9e52-44c6-b463-2916d93e11b3/vitamix_black_friday_2020_deutschland.pdf
    • https://uploads.strikinglycdn.com/files/6193e075-61c6-4f2f-88b7-4226af895cee/atwood_water_heater_model_g6a-4e.pdf
    • https://uploads.strikinglycdn.com/files/78adf0c7-f637-4393-8199-1d3768215528/21931237800.pdf
    • https://s3.amazonaws.com/kubafezin/didaxiwozidisumunilesube.pdf
    • https://uploads.strikinglycdn.com/files/eeea383b-d311-484f-82a7-135ddb92c508/ingles_basico_gratis.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_off00013eac.bin
683daca2abbd1223bb93a3589ee629b66ba3347df69089f83626f34ba0a6332e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAC 5408 bytes
font_01_sfnt_off00015127.bin
f3e733806ec37d2d1717e88a15f53f86855d82726837ed43fc4f29b14f72318a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15127 11692 bytes

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