Malicious PDF — malware analysis report

Static analysis result for SHA-256 9834e0a7af383b6d…

MALICIOUS

PDF

76.0 KB Created: 2021-05-18 08:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 61747c46dec130ba1cf11c68309dbe24 SHA-1: 09cce732a3401b40733647d0325bca0800978f16 SHA-256: 9834e0a7af383b6d32f28bd6271285e15178c9906f32941bfc1ef4b7b902e21e
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=how+to+write+a+business+proposal+for+investors PDF link annotation
    • http://mowewuwopirot.iblogger.org/89520743002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451549/normal_600a82b0a2ac2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_60565f40b85de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463543/normal_603fb05b13154.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jenimubi.rf.gd/central_anticholinergic_syndrome.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/voucher_form_for_senior_high_school.pdfIn PDF document text
    • http://lapefub.epizy.com/good_free_messaging_apps_for_android_phones.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/everton_score_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/hal_varian_advanced_microeconomics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/228cd594-1a2d-4b69-9414-c9ced6b1e315/something_like_an_autobiography.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/63409048208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79bba550-4667-45c3-aecf-0250e37c5cc6/pokemon_ultra_sun_and_moon_legendaries_difference.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/how_do_i_connect_my_linksys_re7000_extender.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e862a69f-5f9b-4719-b128-0425063066ba/46187343533.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/warfarin_monitoring_guidelines_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/amelia_bedelia_goes_camping_guided_reading_level.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/amazing_spider_man_comics_free.pdfIn PDF document text
    • http://tasanixuzapavo.epizy.com/brche_vergleichen_bung.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fb574ac-ee38-47fb-a238-d181390561f8/kilesigomefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/528ae5a7-8bf3-4e08-9ed0-42b611d825b4/what_is_surrealism_in_photography.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_off0000eb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8B 5148 bytes
SHA-256: 8db1b6000e93a06bf89368d50802d7f23aec4bea8d3e8821787ad3ecc79542e1
font_01_sfnt_off0000fd2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2E 11044 bytes
SHA-256: 8dfe05e80b624c9cb69c5924950e9e708cf025f045a63abfa4219d0f8fa2ec2c

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