Malicious PDF — malware analysis report

Static analysis result for SHA-256 0074dd4098539ae3…

MALICIOUS

PDF

87.2 KB Created: 2021-04-05 06:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0cd3e36c12285321dc914ed46d3316f2 SHA-1: 16f3babba1a5e01d1ab3999d31def5570c41fdd1 SHA-256: 0074dd4098539ae3d272836962e02d20e4a528d1c5e2120a7cb5e9d0bebe8f61
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://soxebez.ru/wix?keyword=kumon+reading+levels+pdf PDF link annotation
    • http://jelolizabuvixi.22web.org/antioxidant_and_free_radical.pdfIn PDF document text
    • https://cdn.sqhk.co/wenoxavawo/idgeZFV/nurogetodoxa.pdfIn PDF document text
    • https://cdn.sqhk.co/kofosenolo/gdNMiiH/is_fontspace_safe_to_use.pdfIn PDF document text
    • https://cdn.sqhk.co/gotoruzud/a71yHjf/mopewi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460688/normal_60291a53425db.pdfIn PDF document text
    • https://cdn.sqhk.co/lotazoza/kvjbjji/bupatadokab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379234/normal_6026cd4294d8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421966/normal_604ece7c95e7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452612/normal_6016fdf42f93c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380675/normal_604661e3cdb6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470401/normal_5ff0293046e06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368949/normal_5fe97267a4ccf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ralopokizuneza.rf.gd/50872377622.pdfIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_03ffe3f076d44bce8675a34616f01bab.pdf?index=trueIn PDF document text
    • http://lakowederegono.epizy.com/26114435754.pdfIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_31e221fa981f4b17b143a2fbff555137.pdf?index=trueIn PDF document text
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_0fb53da842694478b01c83ad3d39d816.pdf?index=trueIn PDF document text
    • https://78f5967e-1348-44d0-b43d-4fba71d4c3e7.filesusr.com/ugd/a94f6a_0373afc6ef224ef499d121b77b9553f1.pdf?index=trueIn PDF document text
    • http://zuxamivim.epizy.com/apocalypto_2_hd_movie_in_tamil.pdfIn PDF document text
    • https://9049409e-dcbb-43fe-b7cb-0f7a5d042cf1.filesusr.com/ugd/e59eee_0c3575b19162483a82e377c54d954ca1.pdf?index=trueIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_48e8edb33e5843f4a848a6ee6341c97d.pdf?index=trueIn PDF document text
    • https://1a413096-4115-453c-84a6-e19f3d0a1e7a.filesusr.com/ugd/4a2d03_109f45eb5fae43ff836c89427c7d6728.pdf?index=trueIn PDF document text
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_9c818a6e91054d3996dbea9b043b2bac.pdf?index=trueIn 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_off000118c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C0 5392 bytes
SHA-256: 5a76db7608e921f4905405e56594b518cafe5dc112816c5371fc6eb52bce1df1
font_01_sfnt_off00012b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B11 10596 bytes
SHA-256: f267fc3e99a104636bdc3c5f8e09e5f4dcfa4af61b1607d3db64cd99ab2ace00

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