Malicious PDF — malware analysis report

Static analysis result for SHA-256 79517f5a262f86a5…

MALICIOUS

PDF

73.5 KB Created: 2021-03-11 15:44:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc3c944683ab06cbc54a6df675cf031d SHA-1: ba99cc90aa2373d680b01c034cef86b26ef71f25 SHA-256: 79517f5a262f86a530fab7cee35e5b32f565dd197ca958ff6517e024d590fd63
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious website. The document body, though heavily obfuscated, suggests a lure related to educational materials, which is a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/award?keyword=pearson+chemistry+textbook+pdf+chapter+4
    • https://cdn.sqhk.co/letinumi/BIifiee/27424679761.pdf
    • http://complect-tech.ru/xefegejet3v27a.pdf
    • https://cdn.sqhk.co/gafisasiwu/6ie9k17/7134452283.pdf
    • https://dawutika.weebly.com/uploads/1/3/1/4/131407504/0c59b05e07c77e8.pdf
    • https://cdn.sqhk.co/dukosisevu/hgjjhMT/ronokeza.pdf
    • http://yellownatural.space/kosimawomepwq762.pdf
    • https://xulajaxosu.weebly.com/uploads/1/3/4/3/134366267/e57a6c47b.pdf
    • https://fikenetefi.weebly.com/uploads/1/3/4/7/134771518/xamidogaluxem.pdf
    • http://meetly.space/sorunibilejetumudisibavgw6y5.pdf
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/gusukupina.pdf
    • http://apkweb.net/enoch_powell_rivers_of_blood_meaningnc0yx.pdf
    • http://sendgrid-de.com/jemegitidubapo5febi.pdf
    • https://static.s123-cdn-static.com/uploads/4408330/normal_5fe2c57a97368.pdf
    • http://vquest.website/chinese_dictionary_free_for_pc81b6w.pdf
    • https://cdn-cms.f-static.net/uploads/4385213/normal_6015215d68399.pdf
    • https://cdn-cms.f-static.net/uploads/4469626/normal_6011976eaed7b.pdf
    • https://femukigiterabe.weebly.com/uploads/1/3/2/7/132740239/2894830.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/woberiz/axl_full_movie_in_english_hd.pdf
    • https://s3.amazonaws.com/jinabom/present_perfect_and_past_simple_exercises_worksheet.pdf
    • https://s3.amazonaws.com/tudawufed/jibubifupotupevev.pdf
    • https://s3.amazonaws.com/popisiburewixuj/74842828931.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_off0000e1ee.bin
b3b3d8beb001199621d1b9600bf0ca75355616022ea9cf5f0f1dc6a0a80211e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EE 5828 bytes
font_01_sfnt_off0000f5aa.bin
2cf6b09f021c92194d2a436eb4b5f6e6cb895abb6c4af0e31e81b4c5fccafcee
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AA 10200 bytes