Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0c4bbccd1baa09…

MALICIOUS

PDF

77.1 KB Created: 2021-05-22 23:36:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4969d73b5839041f694d47fb4f4cadd6 SHA-1: db7150c5ce0cd9f220f16774ccfbc0d3ca2987f6 SHA-256: 9e0c4bbccd1baa093b8472b6e64d0b7c1f618f2ad462ba4d85546cd16ee947de
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. 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 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://leonvi.ru/strik?utm_term=marketing+plan+for+bakery+business+pdf PDF link annotation
    • https://bebibamo.weebly.com/uploads/1/3/1/4/131438385/wukewage-xuweretow-demomuwunun-kofik.pdfIn PDF document text
    • https://memetunariva.weebly.com/uploads/1/3/1/4/131454345/felagok_mipaponise.pdfIn PDF document text
    • https://jejusutib.weebly.com/uploads/1/3/0/7/130740078/fed0889b7219.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/bulikowexunepov/nursing_scope_and_standards_of_practice_third_edition_2015_apa_citation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03077061-19fc-4929-ba34-5c646232117d/how_to_activate_the_hopper_on_dish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8767e06c-75ca-4c32-b4cf-96671774802c/como_agua_para_chocolate_google_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82db4c5e-d2b8-4258-a84f-fecdb3546ef0/95239748244.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/date_format_anglais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c05fcd2-d42a-4422-9bdc-d7072d46b3c1/batisisoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deed600d-cb62-4662-9bff-4c6d1b49957c/how_much_is_the_ccna_exam.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/craftsman_garage_door_opener_manual_41db102-2.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/samsung_top_loader_washing_machine_good_guys.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/imperator_rome_1._2_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48ee8709-7dd6-4a67-bf06-7a1394058ddc/nidulul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c77caee-48fb-4151-ba9e-a88eaf9a2043/what_is_the_essence_of_gods_law_in_christianity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e75479e-35d5-42fa-b8d5-95c6b27f8d3e/96360165382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aebc012-5175-41d2-9001-13e5f6fe13ea/6933074725.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/can_i_trade_options_on_webull.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd004da-2d23-478f-b3e0-9c1007d931ce/29662613869.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/4653334089.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/82044662145.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_off0000efcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCC 5520 bytes
SHA-256: b7805b22d36f2da75df90788659001d2073bf831e2d9860d5605f42f5909d7db
font_01_sfnt_off000102b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B3 10508 bytes
SHA-256: f7dbd954a98a3e413737ebb7cc1b54ba3c7238ffdab6237eb90148bb096978a1

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