Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7d29b7fb4190c7…

MALICIOUS

PDF

76.7 KB Created: 2021-03-23 11:02:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 164e83d50b4e06e50b6d4387d7a6a893 SHA-1: 9e579fcb4c9a95293c5f9a8e2113c12865d71ccf SHA-256: 3d7d29b7fb4190c78f47a44e5d155b17a5d2a0ad8d0b267a2a467941932b3d6d
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=best+free+automated+trading+software PDF link annotation
    • http://kindraretterath.com/vejuzituganeszg84.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/h79bgfo/96778438403.pdfIn PDF document text
    • https://cdn.sqhk.co/nudadubuju/jjfjfig/jivinupagosovuxodupilu.pdfIn PDF document text
    • http://nesobaka3.xyz/archero_abilities_guidefs7bw.pdfIn PDF document text
    • http://linza.media/my_samsung_smart_tv_wont_connect_to_the_internetom5e4.pdfIn PDF document text
    • https://cdn.sqhk.co/jevipugirofi/R16MntV/rapunzel_vanity_unit.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/joverigajudedafobunivad.pdfIn PDF document text
    • http://bestcreditcheck.info/8050308991139aoz.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/hghjhgw/rocket_launcher_fishing_rod_holder.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/firel.pdfIn PDF document text
    • http://reduslim-officialsite.site/how_rare_is_1_in_1000khcks.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/blidhce/planet_om_nom_nom_lviv.pdfIn PDF document text
    • https://cdn.sqhk.co/duputokodoz/hjhiig9/59004487053.pdfIn PDF document text
    • http://filexupop.iblogger.org/zipudubabuvapaputeg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d24a26a4-cee4-4359-9afe-82ca8936c907/27564127058.pdfIn PDF document text
    • http://nolonogatifotop.epizy.com/sublime_json_formatter_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c0285a2-f215-40bc-ac76-b87830bed882/biology_textbook_online_9th_grade_miller_and_levine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a3b344-4387-40d4-a1f6-b036d19ad4de/nigamodokadaw.pdfIn PDF document text
    • http://rinexijirava.rf.gd/proper_bench_press_form_for_chest.pdfIn PDF document text
    • http://mogedolexit.rf.gd/wagerelilopupukokub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8281d6a-f342-4704-90e6-817c69d1c82a/99549516741.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_off0000ee8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8F 5336 bytes
SHA-256: f1d1d650cee58fac0a291719581fc3ba1e3103d7493b65af19c692a5387b6995
font_01_sfnt_off000100b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B6 10716 bytes
SHA-256: 49509eac480fae71ef225c08dde671b7a9aab80ae2d2c527eed4972a906428de

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