Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed877ebc3415ed2d…

MALICIOUS

PDF

78.4 KB Created: 2021-03-27 19:29:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1b5bd09ba22c125cb0780139b53b0659 SHA-1: 58136f61c244129ddfe27c03568cc3bafba995ef SHA-256: ed877ebc3415ed2d397831f7abbfbee77f8c5d3327c945ca677a27f4df8bdd3e
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://xajibur.ru/123?utm_term=ncert+biology+book+pdf PDF link annotation
    • https://kukurako.weebly.com/uploads/1/3/5/3/135321284/sigitaguroxiruw.pdfIn PDF document text
    • http://aycotoro7.xyz/kelly_services_inc_jobs_near_mei86tt.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/motiwajexilazoxulitibope.pdfIn PDF document text
    • http://center-san.ru/pre_intermediate_reading_comprehension_exercises_multiple_choiceemetp.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/aviva_platform_login_adviserct76r.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/pofibosel.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/jX4hdzg/soccer_tactics_strategy.pdfIn PDF document text
    • https://tololomajaju.weebly.com/uploads/1/3/4/4/134472688/joreforuzapubenoxi.pdfIn PDF document text
    • https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/jamawadunopafo-vexetenaduwo.pdfIn PDF document text
    • http://vojemodipu.sportsontheweb.net/42465096631.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/66145154788.pdfIn PDF document text
    • http://zatoxuvisovapuf.sportsontheweb.net/neoliberalismo_mexicano.pdfIn PDF document text
    • https://tusatetop.weebly.com/uploads/1/3/1/4/131408029/9bf72017655.pdfIn PDF document text
    • https://cdn.sqhk.co/xolilipedeko/LjcAYja/ai_gallery_app.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/XWzVVJL/redbubble_coupon_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://teropisarazo.myartsonline.com/2020_buick_regal_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a790f078-6e20-4fac-a7cf-1bbc40a924eb/wufesubabegonobutedologel.pdfIn PDF document text
    • http://karokifewugasuz.onlinewebshop.net/histamine_and_antihistamine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb9ae4f2-1ff1-4368-93b0-b4634ae24919/98577804475.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/how_to_drain_a_sundance_hot_tub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c8eba2c-42d3-46b9-831c-6da35beec0a5/74679845242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df9fa057-1369-4ef4-abc7-b431bb3f2db5/21244953580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceabee14-a0f7-4fd1-8a50-b7d3e25e5950/20974588554.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_off0000e7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A3 5212 bytes
SHA-256: 1a8a44bd6229821cc91f89214487dae78ea25a8deee292ba63a77cc1d9c4050a
font_01_sfnt_off0000f982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF982 11196 bytes
SHA-256: 24757462e7bb18710615af0096d92900636f8a150c7b4ed221714fe8e158f906
font_02_sfnt_off00011fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC7 3060 bytes
SHA-256: eed8c166a09d16a8216fa18e30a2b89bb0cf88ad71b7a26520e3a2b5b34f21ea

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