Malicious PDF — malware analysis report

Static analysis result for SHA-256 a246c0482d713495…

MALICIOUS

PDF

81.4 KB Created: 2021-02-25 07:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 3288adfb4ff565d8b2bbe5f16a6ebad0 SHA-1: 63c24ea0672774d7a69f9d2e6c3996d20d4c1b6e SHA-256: a246c0482d7134955bab2ecc4e0e302b1bde0e9535f6c8cadffd441d42f8bc75
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The embedded URL `https://jottigo.ru/award?keyword=what+the+hell+did+i+just+read+david+wong` strongly suggests a phishing lure, aiming to trick the user into visiting a malicious site. No scripts were extracted, but the PDF structure itself facilitated the embedding of this malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/award?keyword=what+the+hell+did+i+just+read+david+wong PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502698/normal_6023cfd035334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_601ec353c22dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_6029afdbc7fb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369498/normal_60223b3070060.pdfIn PDF document text
    • https://cdn.sqhk.co/penutizufib/Oxbgggd/sing_karaoke_machine.pdfIn PDF document text
    • http://medupaj.iblogger.org/character_certificate_in_english_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501509/normal_5febde64a82e5.pdfIn PDF document text
    • https://cdn.sqhk.co/kamupudoro/hihifZ9/pacific_time_to_central_europe_time.pdfIn PDF document text
    • http://xevalarebufop.22web.org/vutowanitulejonapoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/samigimas/dhaFhbg/47940648310.pdfIn PDF document text
    • https://cdn.sqhk.co/tegimatararo/jehijdR/block_craft_3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kosamupim/hd_animated_wallpapers_for_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/bhojpuri_gana_video_hd_ing_ke_sath.pdfIn PDF document text
    • http://josegofubusem.epizy.com/63630129842.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/runuvedogavotutujidog.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/stock_analysis_report_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/escape_plan_hd_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/44183909112.pdfIn PDF document text
    • http://sawelisibov.rf.gd/invisible_man_original_story.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D1 5208 bytes
SHA-256: 0ae51ccc0c0772d135848302516f41d9b19b25a68e4a6cae90cac28f118a8f4a
font_01_sfnt_off0001079b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079B 10124 bytes
SHA-256: c83edf9be740b820745c90c7998b051708dbd966c0f8d140bf33203a77d193f2
font_02_sfnt_off00012a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A4F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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