Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a1946bc955291c…

MALICIOUS

PDF

81.6 KB Created: 2021-03-15 06:17:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8016e037d3fc1b5b536cd2b9836f1992 SHA-1: 5df292f30e8d15ac1a1b9f9c5b94ccecfad2079a SHA-256: 06a1946bc955291cfe7266da55e130092033ed6223eabc665527ec51f7fb0873
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, with a significant number pointing to disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URIs are indicative of a spearphishing attachment, designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/award?keyword=backstroke+swimming+drills+pdf PDF link annotation
    • http://furniture21.online/vutexoduzosudaxesebh2rmr.pdfIn PDF document text
    • https://cdn.sqhk.co/lisakopew/d5ksict/finuxatepomupepumagugewu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458826/normal_5fe99ed4e145e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470028/normal_5feb7e64b73b8.pdfIn PDF document text
    • https://cdn.sqhk.co/savadapo/ifhehih/jio_phone_mein_bhojpuri_song.pdfIn PDF document text
    • http://mx50off.pro/workbook_on_harmony_grade_6_answersv0bsd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446636/normal_5ff78def8e4ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483338/normal_6011eead3b09f.pdfIn PDF document text
    • http://strongcreditscore.info/33244168917407ur.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/6jj5kOR/sniper_traffic_hunter_game_download.pdfIn PDF document text
    • http://gosologesegob.iblogger.org/kadidavugusasojoga.pdfIn PDF document text
    • https://cdn.sqhk.co/tawunipufop/88wDih9/best_online_multiplayer_games_pc_free_download.pdfIn PDF document text
    • http://straponartist.com/36848608792ogld4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475562/normal_602e0a5acbb2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368240/normal_5fcbbc2e696d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473340/normal_5fdcaa186322b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471455/normal_600a833d3ff7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383340/normal_600305da80be0.pdfIn PDF document text
    • http://luxililoxetina.iblogger.org/aarakshan_full_movie_mp4_hd.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/tuzakifezara/37186913595.pdfIn PDF document text
    • http://duzujijola.epizy.com/brother_hl-2170w_error_light.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/jamoronipuvuloxe.pdfIn PDF document text
    • http://leperipuf.rf.gd/supimowajinerazivif.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/nasejus.pdfIn PDF document text
    • http://boreduse.rf.gd/weekly_lesson_plan_template_preschool.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/australian_visa_form_1419.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_off00010105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10105 5680 bytes
SHA-256: 04ff0ddfd3412dafbe11dc102cd3297fd7f2af222213dab3844276b7297fee55
font_01_sfnt_off00011459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11459 10656 bytes
SHA-256: 2d907ccc4fa86513656bd9f12d3cb0a62dde4163bce92089f7fc2f1a2abfcb13

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