Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed88f4ddb9d3384…

MALICIOUS

PDF

83.6 KB Created: 2021-03-19 03:51:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da11dd919925bda8b136493cef231329 SHA-1: 16e9a7fe3b7f369a22ad842c8a4dbebdda667443 SHA-256: 7ed88f4ddb9d33846f15c93e56ce84f838ea68ebcc8ea9efc92e6b0484721d4c
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://nipisod.ru/wix?keyword=lanky+kong+gif', which is highly suspicious. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/wix?keyword=lanky+kong+gif
    • http://lakcherie.ru/rosiselixalezenawt3ldu.pdf
    • http://usesoda.pro/9716812822105v9.pdf
    • http://fanilobepewe.sportsontheweb.net/chuyn_t_file_jpg_sang_online.pdf
    • http://varistop.site/bogonadozupipuniwewogabtuzq6.pdf
    • http://8gusevshop.website/765581566315xnbl.pdf
    • http://rasprodavaika.ru/mean_median_mode_range_kid_definitions5vbg8.pdf
    • http://fituxem.sportsontheweb.net/belkin_n600_db_wireless_n_router_model_f9k1102v3.pdf
    • http://karaulovlife.site/navalumenxsgi.pdf
    • http://tosety.xyz/mukuxowa96e.pdf
    • http://kanobukomovis.iblogger.org/niv_application_commentary_psalms_volume_1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wukevirenesu/intervencion_en_crisis_manual_moderno.pdf
    • http://garulolit.rf.gd/what_is_an_automated_guided_vehicle.pdf
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_2511c25a8c0d4a06ba760f128ac595d6.pdf?index=true
    • http://famomijis.onlinewebshop.net/anti_corruption_law.pdf
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_8593ae75626245c09d9b942160b16306.pdf?index=true
    • https://1d20f49f-ccd6-4d05-b9af-9ecc574be1a3.filesusr.com/ugd/7b50d7_a79a0f67a6aa4a4196356af7abb3ed76.pdf?index=true
    • http://xubudexev.epizy.com/hey_brother_chords.pdf
    • https://s3.amazonaws.com/zesixefe/57586191667.pdf
    • http://sanugifop.atwebpages.com/poisonous_plants_for_dogs.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_off00010cb8.bin
376fab46f345594cb179bd58687c39d752524e8f29c8cf4753d0da6844245f33
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB8 4736 bytes
font_01_sfnt_off00011d0a.bin
b86e2c0168e46c58ef11c123191e40c4f6424c3332169f4d62a33e7707aad81a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0A 10808 bytes