Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6904405e9a3321…

MALICIOUS

PDF

78.5 KB Created: 2021-02-23 21:59:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2d080d1960b9437c56ea6c4e183de991 SHA-1: 5d8d6f90a938b160f7ab295d19fd8bc9c63d7a7f SHA-256: 0e6904405e9a332105b135d27735e10fa590181e3b2abfa1524e6654e247b36c
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-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://maypoin.ru/wix?keyword=icassp+2019+acceptance+rate PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484107/normal_6004871d5910d.pdfIn PDF document text
    • http://malespw.xyz/romantic_quotes_in_tamilzh3d3.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/tiger_and_bunny_kotetsu1wzjz.pdfIn PDF document text
    • http://winoorama.space/laptop_charger_not_working_after_power_surgem7f36.pdfIn PDF document text
    • http://believes.space/nhl_hockey_shootout_ruleswr8r9.pdfIn PDF document text
    • http://futudobofexile.iblogger.org/anne_marie_friends_video_song.pdfIn PDF document text
    • http://potaberukogox.66ghz.com/best_beatbox_ringtone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408582/normal_5ff2d81f5e014.pdfIn PDF document text
    • http://paypallsecurity.com/9363711890hlnff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_603381576f6a2.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/free_cinquain_poem_templatebqhl9.pdfIn PDF document text
    • http://fexodubavilukub.22web.org/fetotupozotenig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407988/normal_602d5eaab625d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://varidigodi.epizy.com/yahoo_search_app.pdfIn PDF document text
    • http://kudugumokob.epizy.com/affairs_cloud_weekly_january_2019.pdfIn PDF document text
    • http://livibodake.rf.gd/communist_manifesto_meaning_in_hindi.pdfIn PDF document text
    • http://batawovajupofu.rf.gd/18753861786.pdfIn PDF document text
    • http://jesuwipefeg.rf.gd/spanish_grammar_eric_v_greenfield.pdfIn PDF document text
    • http://lavodusepigixu.rf.gd/pdf_alleluia_mozart.pdfIn PDF document text
    • http://zexizel.epizy.com/wagoxugotawuped.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_off0000ec09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC09 5312 bytes
SHA-256: 880a874e86664bbbca5b2184ac8428ebd865e92c989809cb2fd0eb5f346bd7cd
font_01_sfnt_off0000fe2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2A 14664 bytes
SHA-256: 81e9e81980f0bb6c7db1aa4032533e0f8fa2894f81eb0ca248d1a621dbf17577

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