Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f923ab96f4b707d…

MALICIOUS

PDF

80.9 KB Created: 2021-01-04 13:23:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: fe711c2bca789cfe0a46082f62eac73b SHA-1: 6581422e9513193e7a6d1029a005cf534de05a0b SHA-256: 5f923ab96f4b707d1d934daf6a2840e1f43cd1f6ec6a0650158a01ac87e75040
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffine.ru/wb?keyword=best%20hits%20of%20the%2060s%20and%2070s In PDF document text
    • https://cdn.sqhk.co/puwukuwos/gcgchbH/9234009868.pdfIn PDF document text
    • https://cdn.sqhk.co/lusajiki/ifghihj/rozanodujekinarilaguze.pdfIn PDF document text
    • https://cdn.sqhk.co/peferitukofa/hagjGgh/merge_town_sunsetland.pdfIn PDF document text
    • https://cdn.sqhk.co/lakekomum/z6G5Fgg/vewenukadaxogug.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/ageAXjb/game_creator_unity_asset_store.pdfIn PDF document text
    • https://cdn.sqhk.co/wevujawej/haZDPjb/big_bang_theory_cast_missy.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/wajibile/mevom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/470a1f1f-8348-438c-8e46-7cb6f26be235/tout_sur_le_business_development.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/simple_birth_plan_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ba94794-a09a-4375-8f7a-83be35b0a385/38187116900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53137fdd-537b-4013-b32d-e87350410df6/vampire_the_masquerade_5th_edition_camarilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2098b821-ee6f-43cf-9d5b-1c276eb11c3a/89076579942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6e54e78-01f0-4c01-af4d-1bcfb405de1e/worksheet_solutions_introduction_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1db8bb4-7581-4413-96f8-2993dfd40116/formato_para_pasaporte_mexicano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/528fa0b2-4368-450c-a422-303025cd3e79/tunadoginowitipa.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_off0000ffc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC7 5292 bytes
SHA-256: 5374ad0eced7d1e5eb52b29d6531ec2babcaa41785fcdf1835c9878bd6b35122
font_01_sfnt_off000111d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D7 11260 bytes
SHA-256: 33617f697b2ffd0d64366e12fa5328d74e6a4cf37536b1b2e6e2127157d2cbb7

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