Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c4dcbcfea7abc1…

MALICIOUS

PDF

94.2 KB Created: 2021-03-21 07:03:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e28d72743eca6f13044712e0d6c5503 SHA-1: 9bd8ce6d7e9b2089adb389be1838e86b5dda81fc SHA-256: 64c4dcbcfea7abc10b1e848a44441bce03a306379d8f25fd92a5bbc39a11a52b
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs, with one prominent URL pointing to 'botokaw.ru', suggesting a phishing or malware distribution attempt. The PDF's structure and content indicate it functions as a link farm, designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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=how+do+you+write+a+7th+grade+argumentative+essay
    • https://cdn-cms.f-static.net/uploads/4467601/normal_602da03d90bb3.pdf
    • http://rokexulom.22web.org/all_yoga_asana_poses.pdf
    • https://cdn-cms.f-static.net/uploads/4379049/normal_6035cab87adee.pdf
    • http://gogatanur.iblogger.org/how_to_calm_down_a_friend_with_anxiety.pdf
    • http://portkamesto.site/vavapatixegojinibusafefijnrtd.pdf
    • http://prizinsta24.space/thinkscript_addlabel_examplesj5fpj.pdf
    • http://pebunoguge.mygamesonline.org/91929339317.pdf
    • http://freedate18.xyz/77655326931ux72i.pdf
    • http://cz-nitrof.website/bulova_mens_marine_star_diamond_accented_black_dial_watch_98e003809s5.pdf
    • https://cdn-cms.f-static.net/uploads/4459468/normal_6023f13ca5a53.pdf
    • https://static.s123-cdn-static.com/uploads/4406208/normal_60049477744cc.pdf
    • http://bcpzonasegurape2-viabcp.com/vr_karts_sprint_apkp9dz1.pdf
    • https://cdn-cms.f-static.net/uploads/4392199/normal_603fd515dfef4.pdf
    • http://slimitalia.space/30828451298tk2no.pdf
    • http://nicechange.space/rivijinokabuviputiwakukja1b8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_9e76bde337634a71abfc2c671c0523a2.pdf?index=true
    • http://gamelaluwer.myartsonline.com/affiliate_marketing_books_download.pdf
    • https://a82c121c-2200-4cd7-aff6-47cf910fdadb.filesusr.com/ugd/117c17_1bbf85cfd089412782b98d0f1ecf1922.pdf?index=true
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_445ebef7223547daa324d28e50150be9.pdf?index=true
    • http://wapolijo.epizy.com/daily_thanthi_tamil_news_paper.pdf
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_1e25dcdf6d6345e6a08827cd030b586c.pdf?index=true
    • http://xigatif.epizy.com/eq_school_calendar_2020.pdf
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_e222b8d3a8324002a7a8124c8258a599.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001242a.bin
c888eed2fd26a4356d239b22b7771245e45cc9c2c8798c954fe95279aa9e94ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1242A 5384 bytes
font_01_sfnt_off00013674.bin
a1deee8f1ed8cfec899f622691aa85706ae5a3e36e6f19ccbb9660393eafa2b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13674 11132 bytes
font_02_sfnt_off00015c7e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15C7E 4324 bytes

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