Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee714e8e43c84a0…

MALICIOUS

PDF

89.0 KB Created: 2021-04-01 04:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 62f71cc4f0802de2d7ff73cb4e73348c SHA-1: 97c25a58385da44101b0f9430f4e89ee5d5b227a SHA-256: 4ee714e8e43c84a06cec2eadf3fe7f7a763a28ffc23145d67961c6cfc1c9dc21
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-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://baarspo.ru/strik?utm_term=big+fish+games+lawsuit+subpoena PDF link annotation
    • http://strgb2.ru/al_arabiyyah_bayna_yadaykww1r7.pdfIn PDF document text
    • http://cryogen.me/atheros_ar9271_linux_driverd4d9e.pdfIn PDF document text
    • http://puveduxorapuba.iblogger.org/70990619547.pdfIn PDF document text
    • http://petersikdar.com/bijiterisebagexavuvltvwt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366366/normal_5fc65c61263d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381997/normal_6042fb53a1e41.pdfIn PDF document text
    • http://kabonuwumew.66ghz.com/compound_vs_molecule_worksheet.pdfIn PDF document text
    • http://about-fb-support.com/xorabavofh56l.pdfIn PDF document text
    • https://marizezibafive.weebly.com/uploads/1/3/4/8/134865590/mowelatidarobo_mojep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485576/normal_606357b628aba.pdfIn PDF document text
    • http://santand-es.com/five_nights_at_freddy_s_characters_namesth5fb.pdfIn PDF document text
    • http://klyshsheff.xyz/prodigy_damage_hackif1q7.pdfIn PDF document text
    • http://com-copyrighit.com/rutobesrmjob.pdfIn PDF document text
    • https://zepitobazelaki.weebly.com/uploads/1/3/4/6/134619491/xafedaruvijor.pdfIn PDF document text
    • https://buvapubadoloj.weebly.com/uploads/1/3/4/2/134265521/8259821.pdfIn PDF document text
    • http://richmaya.site/bundesliga_tabelle_2018_19m7wfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388065/normal_600e65c057545.pdfIn PDF document text
    • https://nuxirudeduw.weebly.com/uploads/1/3/4/4/134442083/2360631.pdfIn PDF document text
    • http://kalusivo.22web.org/black_hole_equation.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/b2f3466b-4072-4f2e-b3ef-75ec9301f2ed/misal_romano_espanol.pdfIn PDF document text
    • http://zerujafulo.rf.gd/foxholes_care_home_cqc_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a4acf7-5f7f-48cf-99c7-302ca2b42f52/susabuwelivimunegololom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac524b42-159e-4cf7-b01b-9306a99cb82f/panasonic_bq_cc17_solid_green_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e83c4f6-cbaa-4911-8f40-98766a9192b1/mary_rowlandson_the_sovereignty_and_goodness_of_god.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_off00011cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD2 5500 bytes
SHA-256: ee602fe896cd5a4e0dc7f5e6e3d513e5c8e4884e968ecb9a78f8135022c122ba
font_01_sfnt_off00012f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F82 11372 bytes
SHA-256: dc273313771915519bfcef70d4f3cf3ca5fa4f2745a4ab542f7214250c0c3143

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