Malicious PDF — malware analysis report

Static analysis result for SHA-256 c28eda8f0831e11c…

MALICIOUS

PDF

85.2 KB Created: 2021-03-30 21:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 06b399e25dc6fbeac345563e84235e9b SHA-1: b0700b8dde2955814437a93a742d6744ac174843 SHA-256: c28eda8f0831e11c92631ec5a75bf0c96d8dcff324a9c61305f111eb8e0e1b98
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/award?keyword=carburetor+system+pdf PDF link annotation
    • https://cdn.sqhk.co/lupokuna/rI0Zoih/vintage_casio_keyboards_for_sale.pdfIn PDF document text
    • https://kuvikupomudu.weebly.com/uploads/1/3/4/4/134457818/loroxufomonekixama.pdfIn PDF document text
    • https://nuxowodevuj.weebly.com/uploads/1/3/4/6/134609076/5439820.pdfIn PDF document text
    • https://cdn.sqhk.co/fopajuxalaso/dZDiuLU/pilisobizexunuluzivaninor.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/SdgcNig/english_horror_stories_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/h9LjgjX/ikea_hours_portland_phone_number.pdfIn PDF document text
    • https://babanude.weebly.com/uploads/1/3/4/0/134017813/2798390.pdfIn PDF document text
    • https://cdn.sqhk.co/fovipobex/jgfjbg1/scrum_daily_standup_template.pdfIn PDF document text
    • https://difanewoxapazu.weebly.com/uploads/1/3/5/3/135321324/weparufamoz_jurosodi_datis_wagaxolu.pdfIn PDF document text
    • https://referozudu.weebly.com/uploads/1/3/0/7/130775612/c2cb3ac3721d.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/sojenozap/wekabokimatomijujexoro.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/java_spring_framework_documentation.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/how_to_count_grace_notes_in_music.pdfIn PDF document text
    • https://f730d15c-1921-46d2-b6d4-288333e40990.filesusr.com/ugd/e2c223_eb8e537bc934430e8e0ea4ff64494f94.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ee6899-79cf-4bf4-bcd5-279b34f1c95c/life_cycle_9500hr_exercise_bike_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/85969374024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d620d3-2f2e-44e7-b699-38eac7eb90e7/carvel_ice_cream_cake_calorie_count.pdfIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_864a9b67ce5c41d4bd9a147edc9b9dc0.pdf?index=trueIn PDF document text
    • https://f1801c53-b3f5-4b94-a9b3-4bb8eb376a66.filesusr.com/ugd/af633f_bbb55020bf0a4b1ea7da4b176e06980f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/fumikikipa.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/imd_monsoon_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/navonosaxapowilelunagi.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/26764268646.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/best_bmw_motorcycle_service_near_me.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_off00011066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11066 5304 bytes
SHA-256: 6a33d42ed4af73bfe7eb38a397bc15978117dbe3f583abec67eb42344bc526ae
font_01_sfnt_off00012259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12259 10884 bytes
SHA-256: 63d6903233f3063c7b30a26995f78b543821b76eb5fe9fc599033239b3778e8f

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