Malicious PDF — malware analysis report

Static analysis result for SHA-256 1769fc291da69ad2…

MALICIOUS

PDF

72.0 KB Created: 2020-12-22 22:10:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: eb0986985ebb7e28d092361f9088749e SHA-1: 10c20eefcea7ebe36208b6b481f642fae38cadc4 SHA-256: 1769fc291da69ad2d5e11ea8632ed19b2876db73946c41848565f09d69a938d1
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=ghosts+n+goblins+mobile+apk+download In PDF document text
    • https://rigozanukamesok.weebly.com/uploads/1/3/4/5/134508669/kogibo.pdfIn PDF document text
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/zojaxewafutege-mirujo.pdfIn PDF document text
    • https://sazejibapox.weebly.com/uploads/1/3/4/8/134863873/6349367.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdc81a80526ad1a5999a26b/t/5fdd200566b686041dc84150/1608327180874/kafepedujiviwebego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e72471f-c06e-45c9-bfc4-8524df38136d/78144305359.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/48083633236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/906b3e47-a34f-4edb-a02e-58ad51378745/gifewesumiginizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac1b5527-a5f8-4891-9d1f-a443090e060b/nutritarian_handbook_and_andi_food_scoring_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/kigowozutevojuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ca84363-8b0c-44aa-bc41-cc7d8dd42d8c/edifier_luna_eclipse_e235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/023a1d96-c367-464a-a289-bcd9a5aace82/5037046443.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/blerd_vision_now_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/story_central_1_activity_book_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b465211-a9d8-4457-97da-0c098261b3d4/morning_has_broken_sheet_music.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C2 5604 bytes
SHA-256: 4126ea024bd4834d5f6284b9ee8c00dceed8cc3c303602c668f06cd18438f003
font_01_sfnt_off0000d5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B8 11760 bytes
SHA-256: e388b0f9921d0976d694f961f2d98e71f1e9435fa8f621cb98a0ffa69470d49b
font_02_sfnt_off0000fd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD80 16188 bytes
SHA-256: ac331ff209e496a545000daa6c22a418664ce8bb09dd9fd1314a38219ce2e6a2

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