Malicious PDF — malware analysis report

Static analysis result for SHA-256 709e347e58c3d0d7…

MALICIOUS

PDF

83.4 KB Created: 2021-03-18 21:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 66a605202e10f02020cc83cfe10f6bc7 SHA-1: 2dade56f441def6424ffe27ed0f1017c66d1fdbd SHA-256: 709e347e58c3d0d7a7fc2b34e428e617e79c737f1621abd7bcaf4e51ef39e17d
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 0.9991

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://ponafet.ru/strik?utm_term=what+is+socio+economic+information PDF link annotation
    • http://findssldz.xyz/introduction_to_cryptography_johannes_buchmann_free_download78495.pdfIn PDF document text
    • http://probmake12.xyz/22_clues_level_15d58mm.pdfIn PDF document text
    • https://wuwiragirek.weebly.com/uploads/1/3/0/8/130874366/bamesafefafelusaxa.pdfIn PDF document text
    • https://foduzivanikatik.weebly.com/uploads/1/3/4/4/134492938/c562c85.pdfIn PDF document text
    • http://goldenframecollision.com/69393126007orz4a.pdfIn PDF document text
    • http://samozanyat.info/mtd_replacement_parts_nz4xcqh.pdfIn PDF document text
    • http://theharaka.online/zifanibinenejahfr2d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lebejos/caravan_hd_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/99277139093.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/50_best_black_friday_deals_at_walmart.pdfIn PDF document text
    • http://poravilotizeve.epizy.com/14460745715.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/58791968334.pdfIn PDF document text
    • http://pejomozudone.epizy.com/precalculus_grade_11_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/happy_birthday_violin_sheet_music_advanced.pdfIn PDF document text
    • http://pugijomo.epizy.com/quantitative_genetics_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/arris_surfboard_sb6141_light_codes.pdfIn PDF document text
    • http://jetedobov.epizy.com/wanalarepapuvebe.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/99161057777.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/application_x-_www-_form-_urlencoded_json_ajax.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/android_tablet_pc_monitor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a75849f-3fae-403f-92ff-ed3f99befec5/tavodupovinukiboxuboladi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff661754-b4e1-4d5e-afd1-5af7ec164216/xigarukatidixozetes.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/carnatic_music_instrumental_audio_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB0 4888 bytes
SHA-256: 4e030e75ca80bf26fabf7dddb52d3ad7a9dcf12aa0ef5242f5303f840465d22d
font_01_sfnt_off00010e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1C 10392 bytes
SHA-256: 753d93074b7c295f7aff4dd454435c67bca8d0260b9a8240d325bad5fe5855dc
font_02_sfnt_off00013169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13169 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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