Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e8cd4cadcb83cd…

MALICIOUS

PDF

76.1 KB Created: 2021-03-23 23:12:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7446656fe8b65844b802b7c5fd3b10dc SHA-1: 40c602266f02f3dfb7d5a38f2a54bdea7dc27374 SHA-256: 89e8cd4cadcb83cdc30c879bff55e390eec50075b8e354abc88cc769b6823f08
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The presence of a URL like 'resalured.ru/wix?keyword=pokemon+diamond+and+pearl+apkpure' indicates a lure to potentially malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/wix?keyword=pokemon+diamond+and+pearl+apkpure
    • https://cdn.sqhk.co/parikozug/Wytieyh/61731075260.pdf
    • https://cdn.sqhk.co/nezuxada/HZgeWZH/beading_for_beginners_tutorials.pdf
    • https://cdn.sqhk.co/netesatova/jfhfqms/download_zarchiver_for_pc_windows.pdf
    • https://zofumevovuve.weebly.com/uploads/1/3/0/8/130874077/4691290.pdf
    • https://cdn.sqhk.co/zenekukera/hebggia/batadozupuwumekowojigufa.pdf
    • https://nesexabaxurozij.weebly.com/uploads/1/3/4/8/134898102/62856cb09.pdf
    • http://juraxoxodas.scienceontheweb.net/teknikal_na_pagsulat_halimbawa.pdf
    • http://form-copyrightservices.com/48502793579nt77u.pdf
    • https://cdn.sqhk.co/sekeniti/getijmn/blaze_and_the_monster_machines_party_decor_ideas.pdf
    • http://resimpub.com/kenmore_freezer_door_shelfpi8pe.pdf
    • http://table-wait.com/case_law_in_south_africa4w15u.pdf
    • https://cdn.sqhk.co/vebiziwob/iabjiyS/jokujorekisunawatabezi.pdf
    • https://buxexemap.weebly.com/uploads/1/3/4/8/134890763/8c65a519.pdf
    • http://antinomi.design/if_you_like_junie_b_jones_tryh6s5g.pdf
    • https://cdn.sqhk.co/litanamamusi/AR51Aig/furozokodoxo.pdf
    • http://penafur.scienceontheweb.net/wbcs_optional_anthropology_syllabus.pdf
    • http://rofuxipof.mywebcommunity.org/ayn_rand_anthem_free.pdf
    • http://nurigoluda.mygamesonline.org/vocabulary_workshop_level_e_answers_unit_3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kusajonopabojos.rf.gd/69208555903.pdf
    • http://raxajuneneg.epizy.com/gupapirezosopo.pdf
    • http://nexopuvesoreben.epizy.com/perform_starter_current_draw_test.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed9e.bin
3df9b51ef9f29634e6d3d66c74afb5d4cfa485155a0a82c22d40df3aaf5709d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED9E 4992 bytes
font_01_sfnt_off0000fe84.bin
538265f5c3d708a5b00562ab2cb27eb55e7efdc7b17753c0422ddb897cf25107		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE84 10848 bytes

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