Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b2c543d6aaa80c…

MALICIOUS

PDF

81.5 KB Created: 2021-04-03 19:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 244da5d888f469705bf88f44d4df6a67 SHA-1: 95edaed1a03a1a472eaf228dbf4b7f97f59a3a9a SHA-256: 63b2c543d6aaa80cfe8a38dbb064697a1d267ace3df91619663bc4b0ab7cdc0a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are disguised as search results for common queries. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier and ClamAV detection strongly suggest malicious intent. The primary goal appears to be directing users to potentially malicious websites, likely for phishing or malware distribution, rather than providing legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=how+do+i+connect+my+dell+wireless+mouse+to+my+laptop
    • http://nufapivevavenak.22web.org/amman_thalattu_kummi_pattu.pdf
    • http://fortuneo-enligne.com/my_doro_phone_will_not_charges8gla.pdf
    • https://cdn.sqhk.co/gofejenizew/j2Zj7Nf/free_lds_sheet_music_cello.pdf
    • https://cdn.sqhk.co/livukigelo/fbbhdhf/fnaf_party_music_roblox_id.pdf
    • http://roxebil.22web.org/hallelujah_a_soulful_celebration_sheet_music.pdf
    • https://lamekibig.weebly.com/uploads/1/3/4/6/134652122/xarab-tuvekukapod-wupogezuf.pdf
    • https://cdn.sqhk.co/visukodo/3cPig8X/cake_decorated_with_macarons_recipe.pdf
    • https://fozabezadako.weebly.com/uploads/1/3/4/6/134639332/6561353.pdf
    • http://idealica-ufficiale.site/essentials_of_strength_training_and_conditioning_4th_edition_audiobookyaoz6.pdf
    • https://cdn.sqhk.co/pesamelez/ifgfhLg/fajefibifilurozilu.pdf
    • https://cdn.sqhk.co/moxoxitij/zxhbijj/fazaki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jisixapuwalim.epizy.com/facebook_video_er_online_chrome.pdf
    • https://uploads.strikinglycdn.com/files/a96c5afe-2e14-4c81-9923-980facf6098c/james_bangla_band_mp3_song_download.pdf
    • http://banudozege.epizy.com/56618566803.pdf
    • https://uploads.strikinglycdn.com/files/dc62e688-959b-4f50-877c-74cc509175ca/why_wont_my_water_softener_stop_running.pdf
    • http://vubimefiz.epizy.com/terujezujafadepisig.pdf
    • http://xitugukunorijiw.rf.gd/the_vampire_diaries_wall_stickers.pdf
    • http://dudulexo.epizy.com/adverb_clause_examples.pdf
    • https://uploads.strikinglycdn.com/files/d9626f9f-cc1a-4878-8e7f-23d1d6cdfcfa/62512932758.pdf
    • http://sijopar.epizy.com/cash_voucher_format_doc.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_off00010009.bin
b9d430f0e26e4eaf86ca49db42f965bde62d6c88239af00021beebeb90868aac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10009 5376 bytes
font_01_sfnt_off0001124e.bin
cb3a0f8145550e76515d7da2c7d41189cecee7cda982cc5c729a181297c9957d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1124E 11184 bytes

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