Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27ec0f651418c16…

MALICIOUS

PDF

73.7 KB Created: 2021-09-14 03:35:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 690519fb217f1bdca4c90b48c7685bb2 SHA-1: 60b679929ec01f50dec3a734b13cc52b79957fb2 SHA-256: e27ec0f651418c160e78057ee2938c91e480333bbb32dcf631084c413654a2d8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://skybuildinfraprojects.com/uploads/11637480828.pdf In PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/44410470264.pdfIn PDF document text
    • https://interno-kazan.ru/upload/files/99906365526.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16130a31446cee---54691703816.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/97229271400.pdfIn PDF document text
    • http://tomboy2.com/images/library/File/22109532525.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/xexakexepugeniwetefarod.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/budaxuwukupotuzesipuvini.pdfIn PDF document text
    • https://smg.bid/ckfinder_userfiles/files/6214580591.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/30347871562.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/nejumujimilonejatubumu.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/gawokamolemebawogodipib.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/jawutunip.pdfIn PDF document text
    • http://oppedisanorobertosrl.com/userfiles/files/12793478063.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/54178295710.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/xelafusuruk.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/34513092071.pdfIn PDF document text
    • https://paramourpourbebe.bettygagne.ca/userfiles/file/97051667962.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/petok.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/79594920569.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/mixonedenikodiro.pdfIn PDF document text
    • http://cwesp.biz/upload/file/pinizesesakekodivenajow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=wifi+is+not+turning+on+in+androidPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD606 17160 bytes
SHA-256: 9e864a706c8f13bc1a84f637b40c2f980185b66b2b6f6e9d52f1c73f34462f70
font_02_sfnt_off000101c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C7 10444 bytes
SHA-256: 583e39b001e1777bc6a51b27743c81b9d4c3640c9ca0bd986c13c11c093b1369

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