Malicious PDF — malware analysis report

Static analysis result for SHA-256 500b0416d59e0eb8…

MALICIOUS

PDF

64.8 KB Created: 2021-02-27 00:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fee7b3c24cf526199e0468f5962baeae SHA-1: 45f9b5ccc8617da0ec7b19880fa27444732da22c SHA-256: 500b0416d59e0eb8080026ad45c6e1817d43a73927b6f32f07ecbec671f890dd
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=excel+urgent+care+east+northport+reviews
    • http://bopolubolef.mywebcommunity.org/40704494454.pdf
    • http://nuloriwilorij.scienceontheweb.net/the_blind_side_movie_storyline.pdf
    • http://kamikofonem.mygamesonline.org/xifufadi.pdf
    • https://cdn.sqhk.co/xivomojuf/ihfe7Ek/3208483090.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tulosa/blunders_and_brilliancies_cadogan_chess_books.pdf
    • https://s3.amazonaws.com/farowug/xazize.pdf
    • https://s3.amazonaws.com/garorowa/a_single_man_soundtrack_movie.pdf
    • http://worupowa.epizy.com/74143095634.pdf
    • http://vatodulalidi.rf.gd/present_perfect_tense_exercises_worksheet_with_answers.pdf
    • https://s3.amazonaws.com/legobegutulo/colony_hybridisation.pdf
    • https://s3.amazonaws.com/divikufifir/tabaxedunasotowo.pdf
    • http://rodedewezijore.atwebpages.com/kigiramifuwivevukedu.pdf
    • https://s3.amazonaws.com/wajibile/crystal_report_untuk_aplikasi_pajak.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_off0000c19b.bin
0d909e4112cd38516d1cbeb5f8d6614024e0b7529e7f7ed2972de2e64cefeb26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC19B 5372 bytes
font_01_sfnt_off0000d3f7.bin
d939b5635f1e8a2813781bd74cb4247a53f9fc7cf0dc8720175e072c8f2a7847		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F7 10004 bytes

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