Malicious PDF — malware analysis report

Static analysis result for SHA-256 e338d537557e8efc…

MALICIOUS

PDF

83.3 KB Created: 2021-09-23 22:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ecee7c6453eb0398683c7b82e25204c4 SHA-1: fc5ab8b53dbb87eee9ce9b1a6a5a7f5a5383a464 SHA-256: e338d537557e8efc0c70571d465010f5810eb2cdf69ac4f79f3fac2627e9f1cd
134 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, including a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful websites. The presence of external URIs and the ML classification point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://chcial.ru/uplcv?utm_term=housefull+3+full+movie+123movies
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f478f913ac---jijudukokajo.pdf
    • https://nazragame.com/calisma2/files/uploads/gufabuz.pdf
    • http://fecoil.com/userfiles/file/tutadijaninisunenija.pdf
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/6176356346.pdf
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/25085030406.pdf
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/87611441741.pdf
    • http://imssp.by/data/images/fxeditor/file/29685893360.pdf
    • https://crv.dascalita.ro/app/webroot/files/userfiles/files/38011765100.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/d9adae73f5ee6deb7f8e0b5da1504f2d/55938474642.pdf
    • http://liderzy.natura2000.pl/imgturysta/files/lujamufawu.pdf
    • http://fratellilongoni.com/userfiles/files/nedulifuwaz.pdf
    • https://omegaplus.bg/uploads/pages/files/tudoxanazuton.pdf
    • https://iringmalaysia.com/ckfinder/userfiles/files/62249076716.pdf
    • http://reylab.com/userfiles/file/83471879500.pdf
    • http://nature-revive.org/files/file/gugeza.pdf
    • https://resonanceacteurs.nl/userfiles/file/tosetokejuwuxotig.pdf
    • http://erodiertechnik-wenzel.de/userfiles/file/kiniz.pdf
    • http://knshzj.com/CKEdit/upload/files/30317806348.pdf
    • https://afra24.com/basefile/afra24/files/46414768507.pdf
    • http://sobateracota.ro/mm/file/48364088977.pdf
    • http://fs-select.com/images/blog/file/fujifebakerapam.pdf
    • http://gazetavk.ru/img/file/47532334667.pdf
    • http://bularz-auto.pl/images/userfiles/file/51547187144.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfd6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD6 16792 bytes
font_01_sfnt_off0000f7e8.bin
7f2bb6da82ac1efb991ca2de9c4d2212883d319dda8e978cb669a34d3c2af4a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E8 18596 bytes
font_02_sfnt_off0001282b.bin
78f13980f298a8eba863027ba83cd82b7a0c3e7cf0d6aa0e6f9242282a170a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1282B 10412 bytes

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