Malicious PDF — malware analysis report

Static analysis result for SHA-256 998724aa58b16e41…

MALICIOUS

PDF

75.4 KB Created: 2021-03-17 08:58:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a4b0a93ae3277cb325b17634b4cea1f8 SHA-1: 3211f49197e6f03f69d04ed691e99ac47bd64235 SHA-256: 998724aa58b16e41fdb76315f81170253ee605a3b3f91ff34a2e0318c95e6588
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'blue eyes technology' to direct users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/award?keyword=advantages+and+disadvantages+of+blue+eyes+technology+pdf PDF link annotation
    • https://bomikuwutivibi.weebly.com/uploads/1/3/4/5/134598741/7837814.pdfIn PDF document text
    • http://ig-about.net/restaurant_manager_jobs_new_york_cityw0xpq.pdfIn PDF document text
    • https://pupikitonusu.weebly.com/uploads/1/3/5/3/135301263/8221302.pdfIn PDF document text
    • https://cdn.sqhk.co/gusoguribus/hdohgjj/2022_winter_olympics_mascot.pdfIn PDF document text
    • http://pc-remont.website/top_skyrim_mods5x4yy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405902/normal_603e5309ea054.pdfIn PDF document text
    • https://cdn.sqhk.co/mugegiduveb/3hfBZhd/78683933236.pdfIn PDF document text
    • http://1s.london/cell_evolution_game_onlineq3nnx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418764/normal_5fcb19f71fb7c.pdfIn PDF document text
    • https://cdn.sqhk.co/movijomo/VhijeQM/rnb_music_instrumental_mp3_download.pdfIn PDF document text
    • http://levantegroup.net/1952210366xy2sx.pdfIn PDF document text
    • https://nazisedisan.weebly.com/uploads/1/3/1/8/131871674/ritigaluzim_bifoxumij_jadoxosilali.pdfIn PDF document text
    • https://purajibimevu.weebly.com/uploads/1/3/4/6/134652176/wuligi.pdfIn PDF document text
    • https://betutemibo.weebly.com/uploads/1/3/1/4/131453998/taxow.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/hbrKtxC/55409862495.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/nakaxidera.pdfIn PDF document text
    • https://cdn.sqhk.co/zujumatatub/idggie2/ballet_couple_britain_s_got_talent.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/william_baum_compreender_o_behaviorismo.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/kizonulisokemajepa.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/gexukalasinezige.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/kindle_paperwhite_3_manual.pdfIn PDF document text
    • http://kufekisawisewo.onlinewebshop.net/first_strand_cdna_synthesis.pdfIn PDF document text
    • http://nudoritane.atwebpages.com/mariage_d_amour_davidson.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/borg_warner_velvet_drive_71c_rebuild.pdfIn PDF document text
    • http://zukomakiduw.myartsonline.com/lumipirodawufev.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_off0000e9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CA 5612 bytes
SHA-256: be7cea17cbefb0325d4eae933a93b0980f21e85c88d4a2025435b20355a9e185
font_01_sfnt_off0000fcf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF2 10220 bytes
SHA-256: 9db56473c63e442dfad86818758e33d9673ca56eb6263c940358b45255db65b9

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