Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed60479aa93521ff…

MALICIOUS

PDF

87.2 KB Created: 2021-03-23 08:34:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a266bca6afa3f7be99ac99c60a43af26 SHA-1: 855bb390c7d85ce27c8a6b70c3950f275b179617 SHA-256: ed60479aa93521fffc86b1f1a531f12e816b988897bbbb1148281bdc120aabcc
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 0.9998

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 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://dafemum.ru/strik?utm_term=titulo+de+carro+rebuilt+que+significa PDF link annotation
    • http://deflecfcvy.best/76858629022vgvhc.pdfIn PDF document text
    • https://cdn.sqhk.co/satukevaguka/lJUgfia/58484685789.pdfIn PDF document text
    • http://usesucre.pro/science_without_religion_is_lame_meaning_in_telugusuvci.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/FJjgghf/indycar_race_today_tv_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/jj1yuic/pixel_buds_3_white_lights.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/wihxLot/gubamupim.pdfIn PDF document text
    • http://santecmb-sarl.com/bapasd9fd1.pdfIn PDF document text
    • https://cdn.sqhk.co/dopiporajen/giggNjg/year_3_time_worksheets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tefotifomasun.epizy.com/39485797489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cff100e8-2e37-4548-9be1-754e2aa60528/kutevajojipux.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/free_adobe_acrobat_pro_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/mpdf_page-_break-_inside_float.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/21242884002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/167f3d84-b004-4089-8971-75187cd263c8/how_to_use_rdt_kit_for_malaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13f69134-611a-49c1-806c-6f8e37377e77/peavey_bandit_112_red_stripe_weight.pdfIn PDF document text
    • http://wefexafunedex.epizy.com/6622054452.pdfIn PDF document text
    • http://tejojode.rf.gd/sokofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17155207-a678-4631-92c5-34f8439c7dbb/vawufekefoki.pdfIn PDF document text
    • http://ripijinev.rf.gd/apc_smart-_ups_1500_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE81 5404 bytes
SHA-256: 9ad3d87c06270ca9f6f9b5c56d86bbb9874afff189f3292a05f9fcda373039ed
font_01_sfnt_off000110e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E2 12152 bytes
SHA-256: 0a519e98ddde5d243fccfa8bc889da607d1177d69ce72ac124bf0d30e9c045b7
font_02_sfnt_off0001389e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1389E 16060 bytes
SHA-256: ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833

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