Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0dbdbb98fee5a5b…

MALICIOUS

PDF

67.4 KB Created: 2021-02-16 13:23:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a24cc1a9fa655336dbc119085eea0c34 SHA-1: 2d27bc1757c817aa8b0e9098fbc600beeed9a372 SHA-256: d0dbdbb98fee5a5b95a03fe3029d7760c2630a121ecb0188c8ad11cdd3f2ffd7
116 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing or trojan. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it may leverage embedded JavaScript for malicious actions, potentially leading to the download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jottigo.ru/123?utm_term=anko+bluetooth+clock+radio+with+wireless+charging+instructions PDF link annotation
    • https://cdn.sqhk.co/putuziboki/5jjiahg/within_movie_2016.pdfIn PDF document text
    • http://srakan.space/cheminformatics_drug_discoverybnk7q.pdfIn PDF document text
    • https://cdn.sqhk.co/wupetutigo/vOKjaq1/best_tuner_for_2016_5._3_silverado.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/57461344923di4wd.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/rugofopudizunobukebidowag9z9pd.pdfIn PDF document text
    • https://cdn.sqhk.co/gojelonub/aOmGqft/22593747392.pdfIn PDF document text
    • https://cdn.sqhk.co/bogijifaviba/tjdqxjg/mezutofoj.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/aHephGg/lipaguxibajerudelej.pdfIn PDF document text
    • http://foyou.store/advanced_level_vocabularyii0vq.pdfIn PDF document text
    • https://cdn.sqhk.co/kagixepo/bzEieZM/class_10_maths_solutions_chapter_3._3.pdfIn PDF document text
    • https://cdn.sqhk.co/livisade/jdGhcgj/zutupogazelesame.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/lebaxa/96960663773.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/kefekifitujodupi.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/annadata_movie_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/84911220491.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/flight_simulator_2018_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/43487279463.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/jufizaritozimabumo.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/how_to_write_a_critical_response_plan.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_off0000c8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BA 5484 bytes
SHA-256: 2a1eb6b39c13611a36da64658113712c2b0cf65504edbc1b67184a3267118283
font_01_sfnt_off0000db6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6B 10748 bytes
SHA-256: 9fea3c2e67c890344330a00d6da3177195b56c583d0870190e07592231833fa4

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