Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cee827619a263ef…

MALICIOUS

PDF

75.9 KB Created: 2021-03-25 17:47:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e4a3721f280884d37e03bdc82de3c360 SHA-1: 13bb8c969c2f06a8d8da5724c6b8dfc7ba2ebca9 SHA-256: 7cee827619a263efa18eb45be98b36216a038836f25afa674cd311769055f610
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 0.9996

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://dafemum.ru/123?utm_term=twitter+profile+photos PDF link annotation
    • https://cdn.sqhk.co/konosoka/sjdhjih/power_rangers_super_jungle_fury_episode_1.pdfIn PDF document text
    • https://pugadaxalan.weebly.com/uploads/1/3/1/4/131437680/zukepugo.pdfIn PDF document text
    • https://cdn.sqhk.co/gezefesete/ghedKih/42495144798.pdfIn PDF document text
    • https://cdn.sqhk.co/munakuvu/X07qwMk/maharashtra_state_board_10th_std_sanskrit_textbook.pdfIn PDF document text
    • https://cdn.sqhk.co/jekenilegefe/geybxVR/gefetuvajabi.pdfIn PDF document text
    • https://pefodiral.weebly.com/uploads/1/3/4/4/134476409/zesukibopitaguj.pdfIn PDF document text
    • https://nozodipipagim.weebly.com/uploads/1/3/1/4/131438171/jomem-fopikejiduf.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/wemazun/uc_browser_apps_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/886818cd-889e-46e6-8546-e0a34ab0a482/89081563185.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/minecraft_1._14_free_pc_tlauncher.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/bomb_calorimetry_lab_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99efdfab-b409-4127-81f3-a22f0c722f3e/what_is_the_definition_of_narrative_poetry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd5f757-e315-4b6f-a79f-d99a5e58c095/the_shadow_over_innsmouth_page_count.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69a0b176-4bc9-4aa4-9425-8b5a31d523ad/vizio_sound_bar_2.1.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/10252842117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f44a2f9c-28ff-430a-8e5f-0f0c93031c02/fender_passport_event_used.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f3fa915-8f9e-4e37-8130-110be4337a5d/bitogigozebedelu.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/kutatike.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/gta_san_andreas_for_aptoide.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/86558242435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8712acbc-1dd6-4ffc-ac53-1438ffcf9eec/53997557670.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/bhojpuri_ke_gana_dj_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_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 4820 bytes
SHA-256: 08f1a85d8f97f04c9ee71d8d4515893baf82646ab80bc8b92f66765e75ea3f44
font_01_sfnt_off0000fcee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEE 11092 bytes
SHA-256: b70f9fb520eaf966aefaf27b77d08e6ff168bd3ec9abc3f38ecfed64c258f5c8

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