Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a00631772a6205…

MALICIOUS

PDF

82.0 KB Created: 2021-03-21 08:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3938993d2b0269825a6bd8cdd1756170 SHA-1: fe7badc42f6f592477278a3867a32510a8c94932 SHA-256: a1a00631772a62052d70cba1a1a32b0c72fd01725dfb0e0b007bccc8c929c0f5
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site.

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://mezovuduw.ru/strik?utm_term=how+to+calculate+control+transformer+size PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417531/normal_6053012cc3519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419623/normal_600e8fc162308.pdfIn PDF document text
    • https://cdn.sqhk.co/texafikogot/FMgc7uc/perfect_shift_game_guide.pdfIn PDF document text
    • http://2020coupons.info/bakozobazafi16y2z.pdfIn PDF document text
    • https://cdn.sqhk.co/perajomipe/Vgd0oqE/xegumatejajulilokusepipe.pdfIn PDF document text
    • https://cdn.sqhk.co/kozutani/ige3gfJ/tujiseve.pdfIn PDF document text
    • http://xtina.online/doxel8vdkm.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/gghfKw1/picsart_animator_gif_video_para_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/zipodumup/c8jjgjE/kirishima_x_dragon_reader_fantasy_au.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484383/normal_60515480938a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/01096396-393a-408a-a31c-a14dcf3c9641/87345442815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c499d9-8557-476a-964f-aeccb02149e8/bulova_chronograph_blue_dial_mens_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f26055d8-86e0-4319-be95-52db59fb7d40/98067389460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a2ba05-d150-4a30-a6b5-034d13824ebd/lojubit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92c845de-a45e-491f-af4b-887c3180444f/72351889803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bd7d87e-a973-4be5-ba73-7be1164b3fd0/fosilekevonasugeku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e17b13cb-d359-46a6-9d98-9e1c94ba9b4e/10079043495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b5e3d43-00d0-459c-897a-cfd88f46bd9a/gre_vocabulary_words_with_sentences.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e3dc7ed-23d6-495b-a373-03c33c1612cb/golf_buddy_wtx_gps_reset.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_off00010266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10266 5128 bytes
SHA-256: eda3d7fc1f7ccbfb842c2098de3f12d3b69a4b4ef580c1d4ae3e2e0802e2f114
font_01_sfnt_off000113db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DB 11564 bytes
SHA-256: 68ad5218ed039f5c51c4b0cf6fe2f6c8ebb29fb22045aa693cda9c3b52e5842f

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