Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddb4db6786fd4f5f…

MALICIOUS

PDF

78.7 KB Created: 2021-03-09 18:32:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d12293ee6f83b768523e4d0ddec77c4a SHA-1: de7d1fd67bb38e004dd93fa81e6850b9aa55d9a4 SHA-256: ddb4db6786fd4f5f863ae084bf2a30e3208f609f6ce6d0e4c24eb2f104d64a55
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The document contains numerous external links, forming a link farm, and the embedded content suggests a lure related to a school mascot search. The presence of external URIs indicates an attempt to redirect the user to potentially malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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-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://jumiwimov.ru/wix?keyword=old+town+maine+high+school+mascot
    • https://fitatopiwize.weebly.com/uploads/1/3/0/7/130739398/f9a336c6fe25.pdf
    • https://cdn.sqhk.co/beledufe/haggbgd/mom_s_word_game_level_23.pdf
    • http://stroy-level.ru/icse_2020_date_sheet_class_10b069a.pdf
    • https://bejolikide.weebly.com/uploads/1/3/1/4/131437094/nadajimuma.pdf
    • https://cdn.sqhk.co/kawurefeki/5K7ghgi/27503854254.pdf
    • https://cdn.sqhk.co/mibaforetu/T6jfgcr/grand_truck_simulator_2_mod_apk_happymod.pdf
    • http://bupetud.xyz/dragon_ball_super_manga_66_spoilerqdm9x.pdf
    • https://jenifamizoj.weebly.com/uploads/1/3/5/3/135319667/4877093.pdf
    • https://cdn.sqhk.co/bemaxopig/evOMAuE/thomas_friends_adventures_dino_discovery_james.pdf
    • https://cdn.sqhk.co/bekutojeke/gdgibGt/mx_player_web_series_list_2019.pdf
    • https://cdn.sqhk.co/bugolajoxodu/deciRgf/30112980653.pdf
    • http://seomagnat1.online/22688013643y2z3e.pdf
    • https://cdn.sqhk.co/rosomugimo/hdjiqx7/53819946561.pdf
    • http://italywom.space/lelinaxonubenavq6lq1.pdf
    • http://slmit.fun/9738006546nvgal.pdf
    • http://stassikorskyi.com/6730445441861gyf.pdf
    • https://cdn.sqhk.co/setewefasari/lyNjgDh/australian_air_force_fighter_pilot_salary.pdf
    • https://cdn.sqhk.co/pizokifuxe/ZgiMThb/salt_and_vinegar_smashed_potatoes_instant_pot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000f6c6.bin
de8de9b3260dd4949421bcad616db3b73e19012446aaec0b777367d2afaae512
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C6 5376 bytes
font_01_sfnt_off000108fa.bin
fb620d71cb3227fdb0c692a3e33924abb0afed7370d6c89984e717c345816ae3
pdf-font-stream PDF embedded font (sfnt) at offset 0x108FA 10660 bytes