Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e9cbe9831b1e58…

MALICIOUS

PDF

85.7 KB Created: 2021-05-17 09:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 41b1b923405e3dc01a3ebdeeca6ff81f SHA-1: 55eca0e27bd4b2678ebe5d448670f47b7016d429 SHA-256: 14e9cbe9831b1e58ffbf6d094a884ca032219c86d210ffdf9dbb17cb3b1b2a17
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs and the document's structure suggest a phishing or malware distribution attempt, masquerading as a worksheet. No scripts were extracted, but the presence of numerous external URIs points to the document's primary function of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/strik?utm_term=similar+triangles+problems+worksheet+pdf PDF link annotation
    • https://wexarasi.weebly.com/uploads/1/3/4/3/134351888/722864.pdfIn PDF document text
    • http://jamilemoderazif.22web.org/vuzoza.pdfIn PDF document text
    • https://wonumajogo.weebly.com/uploads/1/3/1/3/131379434/a7eb8c251.pdfIn PDF document text
    • http://verification-help.com/kufabifemozetewk2oha.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466996/normal_5feef36110998.pdfIn PDF document text
    • http://svarka-aurora.online/timejanejabarxuah.pdfIn PDF document text
    • http://cpskras.website/tanefuxego35srt.pdfIn PDF document text
    • http://bullbananavannaone.xyz/tevatedofoxefagajafiraken3dv3.pdfIn PDF document text
    • http://rastet-malysh.ru/sasimijederijolewufadenmnozz.pdfIn PDF document text
    • http://testrun.ru/markup_on_mac8451e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482880/normal_5ffcd1fea3c8e.pdfIn PDF document text
    • http://save50it.info/is_black_swan_movie_based_on_a_book4r8xp.pdfIn PDF document text
    • https://wigazasadus.weebly.com/uploads/1/3/5/9/135974004/dijim_zalokebe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365621/normal_5fe117fc806e4.pdfIn PDF document text
    • http://xubozogafajus.22web.org/kobukon.pdfIn PDF document text
    • http://topfrag.rip/therapeutic_techniques5g3to.pdfIn PDF document text
    • http://konanozopesan.22web.org/jamaica_outline_clip_art.pdfIn PDF document text
    • http://herss.space/59488599440hlbhy.pdfIn PDF document text
    • http://all-casino.xyz/43823715996dtx0j.pdfIn PDF document text
    • http://com-servers.online/frederick_forsyth_the_shepherd8odgb.pdfIn PDF document text
    • http://a1metromovers.com/berserk_manga_chapter_151326ke.pdfIn PDF document text
    • http://new-leggins.site/vefaday90op.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD1 5640 bytes
SHA-256: d2a634e9a8bc87448314eed129f889a9f52f310d2e3d04edd5259e8bbfde92f8
font_01_sfnt_off0000fec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC9 11280 bytes
SHA-256: 37a181737f6fc933d8ce40394fafc84702d0bbb7b1ce2a33a6c00ea91d720cb1
font_02_sfnt_off0001257f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257F 16072 bytes
SHA-256: 24c5c481937acf4f4841e6563a6d7a18cfdb810806c94b09ac0ff4033348c1e6
font_03_sfnt_off00013a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A1E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.