Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e58a63f4c7d163…

MALICIOUS

PDF

83.8 KB Created: 2021-06-14 13:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 12789851c82189ad9cc6087aae529701 SHA-1: 2d0ab2cf84214c670b72b54fd089847ed3bfe2e0 SHA-256: 24e58a63f4c7d1638faadfb55c043662002e454b8d45b65d63faaa431afc523a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9992

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/123?utm_term=minecraft+bedrock+edition+version+1.+14+pc PDF link annotation
    • https://bodupojuribun.weebly.com/uploads/1/3/4/7/134758420/4026760.pdfIn PDF document text
    • https://jugizefabugej.weebly.com/uploads/1/3/4/3/134377355/nifivuxasede.pdfIn PDF document text
    • https://lebosipob.weebly.com/uploads/1/3/4/0/134040403/2d8bd7ba948d6c3.pdfIn PDF document text
    • https://linizudozurori.weebly.com/uploads/1/3/4/6/134640128/tuveduveruvetaraleka.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/446f52f7-a143-4a2a-8633-ff06fc201a8a/oracle_12c_installation_on_linux_prerequisites.pdfIn PDF document text
    • http://baxikufop.pbworks.com/w/file/fetch/144838122/best_arm_exercise_for_mass.pdfIn PDF document text
    • http://vafobotigef.pbworks.com/f/xuvinobigu.pdfIn PDF document text
    • http://pinurakus.pbworks.com/w/file/fetch/145256316/materials_for_buildings.pdfIn PDF document text
    • http://fafukite.pbworks.com/f/images_good_morning_beautiful.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91ed01e7-d659-44f7-b7dd-726037eb072c/jolegalikuron.pdfIn PDF document text
    • http://wojoxevom.pbworks.com/w/file/fetch/145236552/mosanidedivo.pdfIn PDF document text
    • http://nukuxim.pbworks.com/w/file/fetch/144864957/maxewetavanudumatev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ada74f2-d1e7-4464-8d5f-e80852158b54/where_is_the_pin_number_on_a_dunkin_donuts_gift_card.pdfIn PDF document text
    • http://nagomax.pbworks.com/f/does_windows_10_come_with_video_editing.pdfIn PDF document text
    • http://wepoline.pbworks.com/f/brain_diagram_easy_to_draw.pdfIn PDF document text
    • http://jojuzoxox.pbworks.com/w/file/fetch/145218339/68024614516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb6d567-7c38-44c6-b3d3-c101f13c7131/60852696461.pdfIn PDF document text
    • http://togusan.pbworks.com/w/file/fetch/144427842/zilofel.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144415314/6320488248.pdfIn PDF document text
    • http://zogekinovag.pbworks.com/f/bushcraft_survival_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8173df46-a4c2-42af-a25f-119410d17553/the_experience_economy_free_download.pdfIn PDF document text
    • http://deduxofevit.pbworks.com/w/file/fetch/144624432/digital_marketing_dave_chaffey_7th_edition_free_download.pdfIn PDF document text
    • http://medilekogoje.pbworks.com/w/file/fetch/145285239/17085561154.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_off00010380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10380 5556 bytes
SHA-256: bc26588ea9c51b2d8dfc34268c25d6116b79a2137cbab9dd1fe5f96bda58a835
font_01_sfnt_off00011698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11698 14028 bytes
SHA-256: e19ddc80a3dc49a0a9fcc6227734e29081e2c9d4a254108f667d6e6bcbfb64ce

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