Malicious PDF — malware analysis report

Static analysis result for SHA-256 957979dff8d1cf9a…

MALICIOUS

PDF

79.6 KB Created: 2021-03-07 08:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6228ca8e6019e78c99670c9a2749b9f7 SHA-1: 1632ff7b0bc7ad74e28fd5b6fcdf1f6fb81c9e40 SHA-256: 957979dff8d1cf9ab1c9b6c2895c83c5c54073a26a03a4d19a2183f6bc47c9c9
156 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. 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 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.
  • 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://dugedepap.ru/123?utm_term=braun+series+7+wet+and+dry+shaver PDF link annotation
    • https://pevunefimexog.weebly.com/uploads/1/3/1/0/131070247/loline_fimek_dozem.pdfIn PDF document text
    • http://tigexesuni.22web.org/mississippi_aphasia_test.pdfIn PDF document text
    • https://medijomozu.weebly.com/uploads/1/3/0/7/130775841/304554.pdfIn PDF document text
    • https://viwukafum.weebly.com/uploads/1/3/0/7/130738591/1f7a7f5d.pdfIn PDF document text
    • https://niraxonaweza.weebly.com/uploads/1/3/4/0/134000156/sepevukufugilegenuzu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454432/normal_6013eb1ca7c75.pdfIn PDF document text
    • http://tederurokeroga.iblogger.org/16452377147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475564/normal_5fd63de6a6117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470545/normal_6031406c7efe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425227/normal_6034515d38471.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493201/normal_600291d380e30.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mukutud/64832067965.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/nz_super_fund_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/19721433380.pdfIn PDF document text
    • http://mujasanowagug.epizy.com/bipepas.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/lidezemimogupux.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/66529351110.pdfIn PDF document text
    • http://xadeboni.epizy.com/ridurovezaxol.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/28271329767.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/72609180202.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF812 5264 bytes
SHA-256: 0e20f4ebf47c8d65a6bde0bd954db9d91a6516675373fe71408671d3d5b00617
font_01_sfnt_off00010a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A11 11540 bytes
SHA-256: d5d0bba21597e318d349c420271d07c2b0e8c69643344a0d0f6dcf305025db5d

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