Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1b2ea3f9317445c…

MALICIOUS

PDF

86.4 KB Created: 2021-02-26 12:25:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a20da15bc1e9d8b6da1e4b90e1adffb2 SHA-1: 7a97203c5e1f193740e4ead7277fc145cced49d0 SHA-256: b1b2ea3f9317445ce8dd9d90481ecf7ea4a77054fc27aadc92b124cf0531ca8f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one prominently featured in the document body, masquerading as a search result. This URL, https://botokaw.ru/strik, is likely intended to redirect the user to a malicious site. The presence of multiple disposable hosting domains and link farm characteristics further indicates a phishing or malicious redirection attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest a phishing lure.

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://botokaw.ru/strik?utm_term=what+is+the+meaning+of+orpheus+and+eurydice PDF link annotation
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/9981d19a.pdfIn PDF document text
    • http://natural-shop.info/ford_mustang_ecoboost_premium_convertible_for_sale_near_melpl9q.pdfIn PDF document text
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/6b4278f2cff127b.pdfIn PDF document text
    • https://posajegodat.weebly.com/uploads/1/3/4/4/134477503/mixuji.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/how_many_episodes_are_there_of_defending_jacob_on_apple_tv.pdfIn PDF document text
    • http://goodsun.space/anthony_de_mello_the_way_to_love_deutsch9skok.pdfIn PDF document text
    • https://xafineker.weebly.com/uploads/1/3/4/7/134701786/3296152.pdfIn PDF document text
    • https://silolezozuwagu.weebly.com/uploads/1/3/0/7/130774999/wawabosiki-sapudet-pikujulobej-dotafad.pdfIn PDF document text
    • http://ipatovaalena.ru/punch_out_codes_soda_popinskibehg3.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/epson_perfection_v550_photo_scanner_uk.pdfIn PDF document text
    • http://icub.tech/online_marketing_masters_programs_europexzm2s.pdfIn PDF document text
    • http://takipleskazan.org/537937874dorju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mavefigekote.rf.gd/relagabulopowozerapuw.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/how_to_pair_jlab_neon_headphones.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/acute_lymphocytic_leukemia.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/changing_fractions_to_mixed_numbers_worksheet.pdfIn PDF document text
    • http://gamutazuzores.epizy.com/loparolubamadorakusul.pdfIn PDF document text
    • http://vuzuvasukix.epizy.com/junefijomudutorodajab.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF745 5652 bytes
SHA-256: ddaa9246d1f4ab00f76dedef94bfa84e82c22db7e68f3b487b0b6c4d170d3b1f
font_01_sfnt_off00010a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6A 14404 bytes
SHA-256: bc9c4be7b3d7ae2977e1f2d82deb1514da42a86de66b61cbf66f0952deb88564
font_02_sfnt_off000136e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E4 16132 bytes
SHA-256: 496d14bc75c4ef29c33ce3d8df2ff1f9e7008e30ee2ad78bd147caa0ed9f6bb1

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