Malicious PDF — malware analysis report

Static analysis result for SHA-256 08067c3084f9f6b7…

MALICIOUS

PDF

82.7 KB Created: 2021-03-31 04:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c593990db6891d83ceab735acfcae419 SHA-1: d665aad17a3c059a3f6c85acc0295ec8b0c36b50 SHA-256: 08067c3084f9f6b7c60bb4368d6696cc38a8364fcb581c4b0aaa70b5ca15f9da
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 potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/wix?keyword=transformation+masque+monat
    • http://vunufem.iblogger.org/how_many_volumes_of_the_walking_dead_comics_are_there.pdf
    • http://flowerport.shop/sodeliriboluvadivekimor89d5.pdf
    • http://opensoda.pro/football_manager_2015_download_free_full_version_pc_greeks4t6h.pdf
    • https://wefidabewurar.weebly.com/uploads/1/3/1/1/131164485/gewagulotusetu_roxemufajagav.pdf
    • https://notojusuwetu.weebly.com/uploads/1/3/1/8/131871856/6520667.pdf
    • http://atomlinux.com/51922451588f23pv.pdf
    • https://fagojature.weebly.com/uploads/1/3/3/9/133987822/1166252.pdf
    • https://lalupapetawosi.weebly.com/uploads/1/3/2/8/132816164/menoxem.pdf
    • http://microbestdigitalmeter.xyz/pixel_gun_3d_hack_no_human_verification_201639to0.pdf
    • http://shopeuro.pro/57063019650vtw2u.pdf
    • https://sekowuwumobof.weebly.com/uploads/1/3/5/3/135394032/buzubuwi_gurisepijom.pdf
    • http://tujozavido.66ghz.com/22694788863.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jusagi/zenuvidenokabilumur.pdf
    • http://xapajegawejarag.epizy.com/kjv_bible_commentary_apk.pdf
    • https://s3.amazonaws.com/pexodugosa/vofakaxiti.pdf
    • https://s3.amazonaws.com/mokixetat/88876926126.pdf
    • https://s3.amazonaws.com/jazofi/saxinajenovikikifumumev.pdf
    • https://s3.amazonaws.com/fotepopunaj/will_excel_formulas_work_in_google_sheets.pdf
    • https://s3.amazonaws.com/zarusegibitumet/where_can_i_buy_a_tarot_deck.pdf
    • http://joxumokuri.epizy.com/46476066011.pdf
    • https://s3.amazonaws.com/kifutizijebuj/kavikizezakixa.pdf
    • https://s3.amazonaws.com/jamuluvuvava/merimaz.pdf
    • https://s3.amazonaws.com/jodabiladezot/20406669789.pdf
    • http://regigaxuwejizu.epizy.com/elementary_biology_book.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_off00010719.bin
b391554b908754ae438b130d22823f3130f505af310aedd28630d834f48a7164		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10719 4956 bytes
font_01_sfnt_off000117df.bin
4de9f12bd873e155a3f0b7910606d29be26e92d1eef10ee1cbd69ae1b993d2ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117DF 11068 bytes

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