Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33b2547b3b4be6f…

MALICIOUS

PDF

96.7 KB Created: 2021-02-26 11:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 94c2583841ecf039da3b5f03d6eab02a SHA-1: fb5a3a9c052cb10ebeeab60f4e51d9367e197c79 SHA-256: e33b2547b3b4be6f423a4f6a00d0038fd1803b09e87320180eda7d13060d6836
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains keywords related to salary, indicating a potential lure for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=salary+of+food+safety+officer+in+fssai PDF link annotation
    • http://fajujefa.getenjoyment.net/chartered_financial_analyst_cfa_eligibility.pdfIn PDF document text
    • http://javebamugizal.66ghz.com/fungsi_spreadsheet_adalah.pdfIn PDF document text
    • https://cdn.sqhk.co/zaweniwefi/jjQLgT8/xebawaperelisiwifirefamem.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/84837724446.pdfIn PDF document text
    • http://bbflowers.net/wd_my_cloud_home_duo_20tb_reviewsd7dp8.pdfIn PDF document text
    • http://bestplacefor.rest/mtg_ad_nauseam_sideboard_guide3qcc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418170/normal_6014868c6f073.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426697/normal_5fecc89242308.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/mens_citizen_eco-drive_titanium_watch_ca4241-55e.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/jgigpKV/warriors_vs_rockets_game_6_score_update.pdfIn PDF document text
    • https://cdn.sqhk.co/tobepeliv/Vhiihhj/witizu.pdfIn PDF document text
    • http://gnoogle.site/oh_saki_saki_dj_songpu1ly.pdfIn PDF document text
    • http://piredvizhnik.com/vetakemer5fdlc.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/dWCnoja/pezovitito.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365621/normal_5ffcfef642815.pdfIn PDF document text
    • https://cdn.sqhk.co/nomavunut/gghxNjg/zazazobinuluwenof.pdfIn PDF document text
    • http://govugododuwo.iblogger.org/mofomatilul.pdfIn PDF document text
    • https://cdn.sqhk.co/kagumuzom/dKgrU2z/soccer_mobile_2019_ultimate_football_mod_apk.pdfIn PDF document text
    • http://wutulesarox.iblogger.org/74017476907.pdfIn PDF document text
    • https://cdn.sqhk.co/jelasusoved/oqiifgc/3d_puzzle_games_online_play.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tanamumejoxa.epizy.com/63442284809.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4C 5220 bytes
SHA-256: 555feb19fa6d8f28bbd8d1db7eff843ef97021f6e4adcf1c1ef3fdb494a429f2
font_01_sfnt_off00014c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C25 12368 bytes
SHA-256: 70ba61f3cae3136621f6cc5acfbe4f552010873e729e61a06edfa61dfd7e4ddb

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