Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f88270e721075d9…

MALICIOUS

PDF

70.2 KB Created: 2020-11-30 10:02:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 093c4afadb28f70032ee6a9eb8342d58 SHA-1: 9109f8fe56dc416cb7eefac7c9727243eff3bbdb SHA-256: 7f88270e721075d91c9d08746524b5bf435c3c261b8bc2f62313fb0ff4121f86
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/123?utm_term=video+games+in+spanish PDF link annotation
    • https://kagilomit.weebly.com/uploads/1/3/4/6/134669997/tinekopopifid.pdfIn PDF document text
    • https://kivojiwivumupu.weebly.com/uploads/1/3/4/5/134597008/vewesopepixugedirada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380382/normal_5fa0ba217d098.pdfIn PDF document text
    • https://kejifesabateg.weebly.com/uploads/1/3/4/8/134847793/113668.pdfIn PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/kotojekatez.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/05246bab-8362-4dfa-80f5-d6dc07f34579/lusubit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57eb45f5-4a41-4a33-93a6-e04d1f68bc49/neuroscience_exploring_the_brain_4th.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b53e5472-4550-4493-973f-03d0694a696e/jquery_ajax_submit_form_get_response.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/65143782715.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf522ef3de5e49b55afaaa/1606373941313/95430015591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d84ec9e5-7b98-4018-9ac1-1fd5fa26715b/vidodajaxosaganexipexaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/020c2027-1d4d-410e-a775-f7bc2f40c524/20425836937.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf53a65147b148042a0320/1606374313187/xufiwulajoz.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_off0000d5f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F8 5208 bytes
SHA-256: df984f404b021e4f7d841c5b24c644c60808c8d8f3910ab00a993e2cbeff7170
font_01_sfnt_off0000e795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE795 10592 bytes
SHA-256: 9ba0f246ce7b4a9bf7724d4cc89b3ae5aaa815f40d69fb0ad787c8f131fb1034

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