Malicious PDF — malware analysis report

Static analysis result for SHA-256 d84e3166ea41347a…

MALICIOUS

PDF

80.2 KB Created: 2021-03-30 18:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0cf9851e6739dba07c799eec8c4cd293 SHA-1: 56ccc7e4b88ff14b03e91262ea62ba2dc0541589 SHA-256: d84e3166ea41347a26b418946b60b97c05ef495ac42e241b525eb451a2f1bd3f
186 Risk Score

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 6

  • 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.
  • 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://gimoguvi.ru/123?utm_term=free++watercolor+brushes+for+illustrator PDF link annotation
    • https://sixojatem.weebly.com/uploads/1/3/4/6/134650300/xizaw_jegigim_majorokesa_wadegar.pdfIn PDF document text
    • https://nibadaxolakawub.weebly.com/uploads/1/3/4/8/134882114/b524c65.pdfIn PDF document text
    • https://vowevabejera.weebly.com/uploads/1/3/0/7/130775986/kulotem.pdfIn PDF document text
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/482b285.pdfIn PDF document text
    • https://pulapafux.weebly.com/uploads/1/3/0/8/130874232/15e0ad2148.pdfIn PDF document text
    • https://jodawozuwiki.weebly.com/uploads/1/3/1/4/131437728/ae2c1031.pdfIn PDF document text
    • http://luminar3-download.xyz/general_psychology_books_for_collegekd6gu.pdfIn PDF document text
    • http://sdl-trade.com/esercizi_di_imperfetto_o_passato_prossimo497oc.pdfIn PDF document text
    • http://requiremcgood.com/8_mile_putlockerjrkvv.pdfIn PDF document text
    • http://all-system7.club/how_to_clean_nespresso_aeroccino_41v7z9.pdfIn PDF document text
    • https://kasababafaraw.weebly.com/uploads/1/3/5/3/135336348/d9ae6c86572.pdfIn PDF document text
    • https://xemakoxen.weebly.com/uploads/1/3/4/3/134320116/giselujawitoweg-nozasopevuv-xefevudamuv.pdfIn PDF document text
    • http://milansit.space/gogoxamefukazasujaknv8o.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/woxorojero/free_android_phone_tracker.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/how_long_is_measure_for_measure.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/cocoonababy_fitted_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/19025676616.pdfIn PDF document text
    • https://d668ac4b-7052-46b9-8d0c-7e282d24ced7.filesusr.com/ugd/00fc84_374593c06a4c4e0889be5f072f1910fe.pdf?index=trueIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_9674d09c409e448382f999d29af4e096.pdf?index=trueIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_97da72096fa14fdab83a34002e3e1791.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_off0000fdd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD4 5156 bytes
SHA-256: 1204112085f05b4cd3e20ca3174980779a956e16d7f0f7ee6dc52e07e2203b88
font_01_sfnt_off00010f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6B 10560 bytes
SHA-256: 2186d3abbc89f46e00d60e8577986283139f108ceae5b9cc47a105ee976c9646

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