Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb7b9d641f64fc6…

MALICIOUS

PDF

73.5 KB Created: 2021-01-18 18:48:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 711ee2bc1f591b465184d1c569eab0a1 SHA-1: 7a1bb276c2d43fa9f3c304493f7378383418cda0 SHA-256: bcb7b9d641f64fc6790093178527508797f15cba61e625ca4e20cb297ecd1857
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many of which point to disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and the 'link farm' heuristic suggest the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/aws?utm_term=reading+comprehension+grade+4+worksheets+free
    • https://site-1196275.mozfiles.com/files/1196275/69238141682.pdf
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/ce9836.pdf
    • http://sudenusona.66ghz.com/veselidesusijaxigatutuvaj.pdf
    • https://site-1178227.mozfiles.com/files/1178227/kathi_sandai_movie_video_songs.pdf
    • http://fevozogu.iblogger.org/change_back_button_color_in_toolbar_android.pdf
    • https://latujajadaf.weebly.com/uploads/1/3/4/5/134593938/601eb8.pdf
    • https://sizonijuza.weebly.com/uploads/1/3/4/5/134594560/149970.pdf
    • https://static.s123-cdn-static.com/uploads/4370273/normal_5fc82724e2245.pdf
    • https://danenogamapan.weebly.com/uploads/1/3/4/4/134481258/97378a5.pdf
    • https://setixifofu.weebly.com/uploads/1/3/1/6/131606861/jabisa-zimutudenuk-rawelidemajeg.pdf
    • https://cdn-cms.f-static.net/uploads/4387821/normal_5f8d2586725cc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nototen.epizy.com/faxedasodagozorojiwixaje.pdf
    • http://segoxegigo.epizy.com/watorogojepuwefo.pdf
    • http://nujexaraxeb.epizy.com/8438278982.pdf
    • https://s3.amazonaws.com/muwemivumazulax/act_up_clean_version.pdf
    • http://ravuxigud.epizy.com/sql_date_format_phpmyadmin.pdf
    • http://bisavosimirot.rf.gd/rupinder_gandhi_1_movie_hd.pdf
    • https://s3.amazonaws.com/risisipajole/nacionalismo_definicion.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_off0000e0ad.bin
f41142690b352ed74ab1dfee6e1ce4b1e7acee06ab1827a9134bd597cb3d7a13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AD 5788 bytes
font_01_sfnt_off0000f461.bin
ada522428149763fa2bb619fc420bec0dae8b38794c9aba4158754bc02790f47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF461 10604 bytes

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