Malicious PDF — malware analysis report

Static analysis result for SHA-256 f55788d3b03719cd…

MALICIOUS

PDF

80.1 KB Created: 2021-03-17 15:15:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 24c2db7f9b56c8733a30157bbe8f6a1f SHA-1: 2f9e8da85f5486b3cf0e086614fc80505d337336 SHA-256: f55788d3b03719cd983582d1cfe200275bbbfd225f18f9f5c4b75c24e8d4bd02
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 0.9996

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://vilenefex.ru/strik?utm_term=codigo+113+netflix PDF link annotation
    • http://bebetadiruj.mywebcommunity.org/how_to_understand_summary.pdfIn PDF document text
    • https://xaziribubeka.weebly.com/uploads/1/3/4/3/134397614/2157220.pdfIn PDF document text
    • https://remavugotidub.weebly.com/uploads/1/3/5/9/135962193/ceccb1a.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/what_is_california_association_of_realtors.pdfIn PDF document text
    • http://kalukoroduro.mygamesonline.org/islamic_books_in_urdu_free_download_ahle_hadees.pdfIn PDF document text
    • http://mosuxuvemuzuwex.mywebcommunity.org/49914218731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408343/normal_601b0b7ad950a.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/v_for_vendetta_free_movie_download_mp4.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/26252576516.pdfIn PDF document text
    • http://gibelineg.sportsontheweb.net/macys_walt_whitman_mall_hours.pdfIn PDF document text
    • https://guvufusefek.weebly.com/uploads/1/3/1/0/131070011/fozadezip-xewobevuto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403806/normal_6031eea66cc73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386591/normal_5ff66a5735f03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389821/normal_6042db2e70903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470698/normal_5fe9b7bb1dc38.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/nivitekonatonameletexik.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
    • http://luxupuxud.myartsonline.com/rassembler_des_fichier_en_ligne.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/46041465776.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/kotivowidebifowo.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/crock_pot_chicken_cook_time_on_high.pdfIn PDF document text
    • http://nabulegewuwal.myartsonline.com/guputovokelenefebag.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_off0000ed9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 4684 bytes
SHA-256: 1e0496a06dddfb3bbf95ffb6d3b83ac4bcd489c4ca4c05bf14bd7c73ee14a0ef
font_01_sfnt_off0000fdb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB3 11540 bytes
SHA-256: f719f139e07baebaa819865d83a4bc641071e76a92b8c2b2ecf87c3acaeeb669
font_02_sfnt_off00012365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12365 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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