Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2d5e53c4804f37…

MALICIOUS

PDF

84.4 KB Created: 2021-03-30 00:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 151c6ad3f02021c309b898ead8c5b413 SHA-1: ea04bd84bea4207a8ac232e029eb4b1f77769e39 SHA-256: 0d2d5e53c4804f372a413cc3ed293d36ac9a49feb5834a7d2e186ee6999739d5
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, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the presence of numerous external URLs, including one that appears to be a redirector, points towards a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pelibifir.ru/strik?utm_term=what+is+biblical+spiritual+discernment
    • http://itnegozio.info/62300005261q9pc3.pdf
    • https://cdn.sqhk.co/napumefu/ehgvig6/duwaxavanafukelinedaza.pdf
    • http://rukozhop-guide.com/amelia_bedelia_goes_camping_youtube6dn4a.pdf
    • http://republvinb.fun/how_to_see_stock_market_futuresnibvr.pdf
    • http://duplicwcnj.space/linear_algebra_4th_edition_solutions1kckb.pdf
    • https://cdn.sqhk.co/nepajenine/diahhia/tv_series_quiz_and_answers.pdf
    • http://vipmanmarket.space/problem_solving_101_indonesiapxtew.pdf
    • http://businesshelpservice.com/information_technology_salary_philippines_20202gejf.pdf
    • https://cdn.sqhk.co/wenegifuteg/4ighehd/3238481081.pdf
    • http://pezejij.mygamesonline.org/shadowing_let_s_speak_japanese_english.pdf
    • https://cdn.sqhk.co/gefimiwotux/kjiigic/good_parenting_guide.pdf
    • http://porn77.design/magibisezoresodapekei913o.pdf
    • https://cdn.sqhk.co/zudatona/yjihdhj/drive_for_speed_simulator_apk_mod_unlimited_money.pdf
    • http://lnstagram-helps-contact.com/96311135229vjy8w.pdf
    • http://ganitigusawev.mygamesonline.org/exercicios_briofitas_pteridofitas_gimnospermas_e_angiospermas.pdf
    • https://cdn.sqhk.co/nixibaraje/ibgddja/cloud_bread_tiktok_recipe_no_cornstarch.pdf
    • https://cdn.sqhk.co/jowoluguwoge/WhhDwhb/47399447713.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zutugidod.onlinewebshop.net/lugowabi.pdf
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_97f31c3d144f4bd0a38b8013b96f81f3.pdf?index=true
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_00970bf4a8e842c8af21ea6c8be79945.pdf?index=true
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_98bfc85fbde74c80a33b89cfb71b17e7.pdf?index=true
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_e28a5277d0d34895bfa5b3b6a075e7c8.pdf?index=true
    • http://moxadokikubod.onlinewebshop.net/utility_function.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_off00010d8b.bin
84ba70340966715357eccbb42ea28f998fa279c1f6ff2cfd9920c184d02168c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8B 5468 bytes
font_01_sfnt_off00011ff8.bin
55b8cf13dff5d8f297323ef1c0e54d9f5224ab53d3dbd49dd3e4caf732db41ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF8 10640 bytes

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