Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0190c2bd0a4460…

MALICIOUS

PDF

80.1 KB Created: 2020-11-11 19:42:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 255b891dfecc34597fee20e0637718b8 SHA-1: dba707c82c4924cf96f3a0c86b9f51de4cb72e8e SHA-256: 7d0190c2bd0a4460d72dc39ca743ddc036618abe0a7b9b239cb77034b723d00f
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 and routes users through malicious redirector infrastructure. 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/123?utm_term=lemonade+war+pdf In PDF document text
    • https://valodoxajub.weebly.com/uploads/1/3/4/4/134435871/7148744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372383/normal_5f93464f61184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_5f8c8138b7b73.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
    • https://s3.amazonaws.com/telasebisu/moto_z_play_user_manual_file.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/anger_management_therapy.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/4877255253.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/sozepaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b74db7-124a-414b-82da-a659af63928a/bifajovasesazomawimax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95f59d70-41df-44c1-851f-d3387713ce4e/66606133455.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/jurnal_ampisilin.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/75970358487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de828fd-5cb3-4113-bd47-19f2456d1403/password_manager_xp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24a621e6-624d-4995-a88e-954038d6f4e5/ilauncher_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/schedule_builder_u_of_m_tc.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/dictionary_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc4ab168-cc66-4348-843d-82f13a67f308/ten_days_to_self_esteem_free.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_off0000f101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF101 4668 bytes
SHA-256: b04fb09d3001c392917049e9553efb96b1cb6411c90cdf2a4a05207310b2a3d4
font_01_sfnt_off000100c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C3 10748 bytes
SHA-256: 5c96e5335d9ba3996758a59ccb564dffdba0a26045a91bfdf2873ec605adae7f
font_02_sfnt_off00012570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12570 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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