Malicious PDF — malware analysis report

Static analysis result for SHA-256 64eb8ee9694b8e37…

MALICIOUS

PDF

73.6 KB Created: 2021-02-19 00:50:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: be37da01ee79d2e0e73be69e9492c2f9 SHA-1: ec5553d189e804762729e295baf0fda9a771b2f5 SHA-256: 64eb8ee9694b8e37abb11e060ee14df6fa3330b066d5d0aee43ab06d66ec464e
156 Risk Score

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 0.9998

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://crophysi.ru/wix?keyword=speckled+perch+steakhouse+okeechobee PDF link annotation
    • https://cdn.sqhk.co/pegidago/XCZRcjr/hunger_games_whistle_ringtones.pdfIn PDF document text
    • http://matroskin.space/76055059546m6v5x.pdfIn PDF document text
    • https://vubumixot.weebly.com/uploads/1/3/4/7/134751696/4804980.pdfIn PDF document text
    • http://todayshop.website/vehicle_tracking_app_android_studiozw4gq.pdfIn PDF document text
    • http://helpcreditscore.info/health_economics_journal_list9sq42.pdfIn PDF document text
    • http://axecheat5.xyz/fighting_star_mod_apk_android_1od7vd.pdfIn PDF document text
    • https://pazopoxe.weebly.com/uploads/1/3/5/2/135293382/kakekabajo-jizorule.pdfIn PDF document text
    • https://nimekeboxiz.weebly.com/uploads/1/3/0/8/130873861/792dffc5e90218d.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/jg5Cid6/wind_waker_gamecube_hero_mode.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/limewub/new_bodo_film_onnai.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/power_bi_add_bookmark_to_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/durijitobawepenekig.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/45202111269.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/android_go_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/pujabarshiki_anandamela_2019_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/mepodizagit.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/kawafexiwivokef.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/bsc_nursing_2nd_year_syllabus_muhs.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_off0000d589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD589 5196 bytes
SHA-256: daad9a281466b79352bca12943c683ab323d094f5d615a007fdbbcfe7e04a6b7
font_01_sfnt_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 10344 bytes
SHA-256: db3d5787a089152a287f8918ff67113469a954cb54fd0c686e261c1c5b4bf991
font_02_sfnt_off00010a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7E 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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