Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d5fd21cc326751…

MALICIOUS

PDF

78.7 KB Created: 2021-02-19 13:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 85bce9900404f7bbaf0933c47245cbd7 SHA-1: 80b62766c690f17aac12dead5bb89cfc699f275a SHA-256: 55d5fd21cc326751f3ae01d40e5942ceb343539e097a9e14537b04a68d93dccd
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to appliance maintenance, a common tactic for social engineering.

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://leonvi.ru/123?utm_term=how+to+clean+samsung+aquajet+vrt+smartcare+washer PDF link annotation
    • https://cdn.sqhk.co/gufezitaxato/qXpiiNv/86638433294.pdfIn PDF document text
    • https://cdn.sqhk.co/geroterunetu/jaJGIgh/bobebefefenomedufiwaliki.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/cKEieqV/razakikozenexowapaxefede.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/jiC7ghj/jumonefilozugul.pdfIn PDF document text
    • https://cdn.sqhk.co/bezofusipow/QvBhhhd/flight_simulator_2018_flywings_free_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/DBpgdjg/4827024334.pdfIn PDF document text
    • https://cdn.sqhk.co/tusadopovet/xhahiHV/wexirutuderilesog.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/jcjjrif/generalized_anxiety_disorder_definition_synonyms.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/mogipegi/47117956633.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/rerogebemolinopibi.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/tipenowuwifasidisifeluz.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/22836730983.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/warhammer_40k_8th_edition_orks.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/69018954503.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/how_to_set_up_total_gym_fit_max.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/jigepemopezubupimiganata.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/informal_methods_of_amending_the_constitution.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/tokexex.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/bollywood_film_war.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_off0000f549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF549 5528 bytes
SHA-256: d47fdce20a99af98278153722da500c16108ac1f3fa40267e2ad2cfcbea5057f
font_01_sfnt_off00010808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10808 10800 bytes
SHA-256: 3049f3efab3ae2f0bc256346af0699a69d89ed692b7ed8cdded7749f185d6812

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