Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb0daf635c9cde8…

MALICIOUS

PDF

84.6 KB Created: 2021-03-18 05:45:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 91ca7495aa4607ab02c5923222361903 SHA-1: 1fe9cacf83e63ffdee1d4bd594bc23171162d3b6 SHA-256: cdb0daf635c9cde8fa0d575b51f153e7e30e2cc5aa769bc37fc81e249c8d2642
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple external URIs, including one that appears to be a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains keywords related to lures like "baby filter snapchat code" and "car calculator lease", indicating a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/wix?keyword=baby+filter+snapchat+code PDF link annotation
    • https://cdn.sqhk.co/dukasavubu/wgcghgh/car_calculator_lease.pdfIn PDF document text
    • http://detonic-hypertonie.website/pajigemapirunuwn13t.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/7Ef5qhd/packers_game_live_streaming.pdfIn PDF document text
    • http://laxelenokuro.22web.org/material_safety_data_sheet_magnesium_chloride_hexahydrate.pdfIn PDF document text
    • http://mavpa.fun/bekal_fort_information_in_marathiend5w.pdfIn PDF document text
    • https://cdn.sqhk.co/gasosivifug/bbfiycd/zombie_wave_shooting_game_mod_apk.pdfIn PDF document text
    • http://indir-kazan.com/how_do_i_reset_my_microsoft_wireless_mouse_5000m2af2.pdfIn PDF document text
    • http://dovulup.iblogger.org/23254508602.pdfIn PDF document text
    • https://cdn.sqhk.co/xadakede/gjn7qy5/life_after_death_tvb_drama_song.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d38713d8-f9e0-49bf-8e72-3f46774ce551.filesusr.com/ugd/b3faf5_73b3bf37cb044a83ae9b4319f655f2a0.pdf?index=trueIn PDF document text
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_52b3c0cd779d4f05b5023e0f24e1265c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/taturi/mh_cet_law_online_form_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5264458c-c920-447c-8c66-d62851faa99f/writings_on_the_wall_piano_accompaniment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfc4a01a-e154-4bd1-b03e-c1cd7228ddd0/how_to_tell_if_your_home_ac_blower_motor_is_bad.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/accident_report_example.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/taxinobevoje.pdfIn PDF document text
    • http://xidapevow.epizy.com/63318978233.pdfIn PDF document text
    • http://gedilemusotatem.rf.gd/3279839017.pdfIn PDF document text
    • http://bupizakeluv.epizy.com/nikomazakinagirazawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e25b4a0-260b-4940-b783-6c5a4e8d45a3/ley_de_propiedad_en_condominio_de_inmuebles_del_distrito_federal_2019.pdfIn PDF document text
    • https://3437305d-a3f4-4f94-9a63-846dd410f5be.filesusr.com/ugd/ffe76b_5d4b2e42bda4411b96671e92278bd514.pdf?index=trueIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_28aabac80fb148a0b8a314ec2109c304.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/therapy_goal_setting_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abb46064-b370-42c8-893b-102bd721494f/9614118178.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF448 5532 bytes
SHA-256: 7aa55fb8016ffd91dedcf06b08aab705f8abc8e2ed907f1b7f51d8a3d38950b8
font_01_sfnt_off00010711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10711 10900 bytes
SHA-256: 45a677be689f77458b7bf7b677773aea17f0dda942dfa2ca8949029470b0a82c
font_02_sfnt_off00012c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C58 16936 bytes
SHA-256: cd4a631e2a16a5972dd953e1ca3370410b8048663fc833ad74565e8532587062

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