Malicious PDF — malware analysis report

Static analysis result for SHA-256 76207835ce466fc5…

MALICIOUS

PDF

73.6 KB Created: 2021-03-01 11:25:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f1ccb8b3ad3eee8c0968a40ee0c4922 SHA-1: e5f1445d7342a728dea578bc5cbc58888bc1d096 SHA-256: 76207835ce466fc5bbadc363d925491df1eedf533eeff10d3ec7b8528d906da4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it's part of a link farm designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, appears to be a lure related to educational degrees, likely to trick users into clicking the embedded URLs.

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://xezojetit.ru/award?keyword=what+is+curriculum+and+instruction+degree
    • https://cdn.sqhk.co/maweveju/DuYuja3/papisuwijifukiz.pdf
    • http://fanisore.sportsontheweb.net/entwined_with_you_sylvia_day_summary.pdf
    • https://fakipaga.weebly.com/uploads/1/3/1/1/131163599/90fb8660.pdf
    • https://cdn.sqhk.co/gubisagebuto/idjaf6O/halloween_coloring_book_pages_to_print.pdf
    • http://wotaxatumumodok.sportsontheweb.net/28609103317.pdf
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/pusimevetup-jofisifaxuvemi-xemivubalib-pekilugiroki.pdf
    • https://cdn.sqhk.co/datawafag/hgjfmgi/zombie_apocalypse_2011_full_movie_sub_indo.pdf
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/5637614.pdf
    • https://cdn.sqhk.co/wifopuzuxiba/al8Vcja/origami_flower_lotus_blossom.pdf
    • http://vnds-v.website/dituxixouax0m.pdf
    • https://cdn.sqhk.co/kojetozativ/egdZibV/zedd_the_middle_live.pdf
    • https://retowukiri.weebly.com/uploads/1/3/4/5/134592720/pexuj_feluxutedusaxuw_betovepetewu_sizidumobokodi.pdf
    • https://cdn.sqhk.co/rifojimuna/eGTV5Tc/1281531452.pdf
    • https://cdn.sqhk.co/duvapegoleva/Qig9aKp/gta_5_story_mode_mods_ps3.pdf
    • http://subuxiwubemew.getenjoyment.net/bagor.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_off0000e3e4.bin
2c93eadd585f34ab0c453c6d260e1140a16d8d918c1405346a289d41e9378620
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E4 5364 bytes
font_01_sfnt_off0000f600.bin
54523345ea0e1d33b7a50f5e5586f96e1c3d1ecb991d3e6b87fc985ecd91a5b9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF600 10368 bytes