Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bed0e0b16032f43…

MALICIOUS

PDF

152.7 KB Created: 2021-03-19 07:46:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 72130b92ea12ebf085c37bc1227e2793 SHA-1: 8e83a0909860b6a3a7a2c692ea1314556b348b3a SHA-256: 9bed0e0b16032f43ec3c6f15d4880aa2a42a79f717cf89e9773608e8fa652971
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 0.9986

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://kuzutuzo.ru/strik?utm_term=what+are+the+4+chapters+of+the+yoga+sutras PDF link annotation
    • https://xugilatopuke.weebly.com/uploads/1/3/4/7/134746985/7341997.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405930/normal_6002eded33e04.pdfIn PDF document text
    • https://xawavefite.weebly.com/uploads/1/3/4/6/134667803/gigasesuz_nunasamala_wemuja_sadula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491965/normal_60125897c138a.pdfIn PDF document text
    • https://dajixogemozuv.weebly.com/uploads/1/3/1/4/131438707/cbbcccae437a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492573/normal_601aa35c90a33.pdfIn PDF document text
    • http://bukawavado.medianewsonline.com/zisafoponetagutuxeliniliw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409000/normal_60133f868a1ae.pdfIn PDF document text
    • http://taxutipepavij.iblogger.org/bikini_bottom_genetics_incomplete_dominance_answer_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454280/normal_601d19c543885.pdfIn PDF document text
    • https://wipemaxo.weebly.com/uploads/1/3/5/3/135345075/3897e1.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b615eccc-4413-4b1d-8109-ede925130a83.filesusr.com/ugd/0994f9_b3eb9bd489544716ade1d4da646f3838.pdf?index=trueIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_ee97fbe8e3bf46f38c8882be1bad16e4.pdf?index=trueIn PDF document text
    • http://suxudogakol.myartsonline.com/gizukabopufadi.pdfIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_29e0864ebdf14154912e16520be12512.pdf?index=trueIn PDF document text
    • http://zilomit.epizy.com/18335188126.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00023110.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x23110 10960 bytes
SHA-256: 55916d4693eefa7b74cf8a9fbea40feb4785f6df45296aa5b328285ef62993e9
font_00_sfnt_off0001e6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E6E3 5448 bytes
SHA-256: 73a942b071e7c09f28852575e705ad5ffb7e733a11eda6bda925ca0d1b42dab1
font_01_sfnt_off0001f987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F987 3740 bytes
SHA-256: 6ce3ed3d0cf168fbf74d6eb321148d5efc31cda11559831b77020f7d4c9f4c8c
font_02_sfnt_off00020502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20502 15216 bytes
SHA-256: 7d9d1cf53f5bf5823551476be57a72db77823c26b754dbda8962b2c29bb8d3d7

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