Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bdd6c9232da139f…

MALICIOUS

PDF

77.3 KB Created: 2021-03-19 03:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97310d23e66cbf1b69ffec8b1b64c27c SHA-1: 892ed1c8fb781a07ae65a874ac03b39a7efbd811 SHA-256: 4bdd6c9232da139f06a234540bd76dce9f3eb6c86ee60b74ac4912a05ce5fba2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of a 'PDF_SEO_LINK_FARM' heuristic suggests the document is designed to host a large number of external links, potentially for SEO manipulation or to distribute further malicious content. The 'SE_DOWNLOAD_BUTTON' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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
  • 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://vilenefex.ru/123?utm_term=maya+animation+software+free++full+version
    • https://bixunirejo.weebly.com/uploads/1/3/5/3/135329058/7967612.pdf
    • https://cdn.sqhk.co/vulovosovem/mifMlia/bubble_gum_simulator_codes_october_2020.pdf
    • https://cdn.sqhk.co/sururezog/wccjjji/3d_paper_origami_template.pdf
    • https://cdn.sqhk.co/pobijejok/hjjxngc/uniware_pressure_cooker_reviews.pdf
    • https://cdn.sqhk.co/lunapolakezo/ieigigP/pixel_gun_3d_pc_emulator.pdf
    • https://cdn.sqhk.co/fagaxirupunu/icz0Gc6/office_boss_chair_online.pdf
    • https://cdn.sqhk.co/mesafovojifo/pjdhcLn/followers_tracker_for_instagram_app.pdf
    • http://tefulen.iblogger.org/bms_system.pdf
    • http://vejiredokeku.iblogger.org/serir.pdf
    • https://duvozeja.weebly.com/uploads/1/3/0/7/130739152/97a93f8f.pdf
    • https://cdn.sqhk.co/bukevexej/jCUggYi/farming_master_3d_mod_apk_revdl.pdf
    • https://dibovasejul.weebly.com/uploads/1/3/1/0/131070518/7589214.pdf
    • https://cdn.sqhk.co/fefamuve/nidEjih/1347547614.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tunenijexe/muguvaf.pdf
    • https://s3.amazonaws.com/temujonuwu/lokamutejararetewufipazu.pdf
    • http://vokuloramemi.epizy.com/how_to_read_wes_evaluation_report.pdf
    • https://s3.amazonaws.com/jirebonudur/paragon_electric_timer_ec7004.pdf
    • http://vitixageseda.rf.gd/9th_grade_math_questions_and_answers.pdf
    • https://s3.amazonaws.com/tumasun/causes_of_the_second_great_awakening_apush.pdf
    • https://s3.amazonaws.com/vutame/cheer_haran_documentary.pdf
    • http://nitesegu.epizy.com/4517574884.pdf
    • https://s3.amazonaws.com/rovuweraja/46066381612.pdf
    • https://s3.amazonaws.com/xonobijikivo/honeywell_chronotherm_cm907_manual.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_off0000f0a7.bin
046be1974160d54f8be1ea4bef18af6bd9f7590329ac5869f97cd2d4d5a16e42		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A7 5172 bytes
font_01_sfnt_off00010251.bin
82c90224a98b16bf5c2428a11dba12d0f34b51c85339c9aca982e9e62e3b6029		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10251 10892 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.