Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7e0df3b8af4bc5…

MALICIOUS

PDF

80.3 KB Created: 2021-09-10 17:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dc8667c83eecfd1752659da70dc1baa5 SHA-1: e76ae3f4f1b9b931392ba61173ba2e1b191a33ea SHA-256: 2f7e0df3b8af4bc57e08ccae9c57788b2036563f6e56ffbcff4626a1ea372bbf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to other PDF files hosted on a variety of domains, many of which are unknown or appear to be part of a link farm. This suggests the primary purpose is to lure users to download or interact with further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://siciny.pl/userfiles/file/32388567147.pdf In PDF document text
    • http://e-baze.lv/images/site/file/mupidozidazezizebadaf.pdfIn PDF document text
    • http://ndt-ultratech.com/files/xolafafojulano.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/24003801181.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16134d09b20c49---kepinukebi.pdfIn PDF document text
    • https://austarpharma.com/upload/files/gadatelivorelerudati.pdfIn PDF document text
    • http://nfc.soo.jp/file/47585485859.pdfIn PDF document text
    • https://cplastik.eu/data/cms/file/16797540747.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/35700104524.pdfIn PDF document text
    • https://2acontractor.it/images/file/zusetagazipekuvego.pdfIn PDF document text
    • http://vector-mebel.ru/uploads/files/vasazepefijuv.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/54103921771.pdfIn PDF document text
    • http://waycreon.net/bhaskar/yii/upload/files/wafitu.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/99514977173.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/42053235936.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/28852353066.pdfIn PDF document text
    • http://mclarenquartz.in/ci/userfiles/files/pikiwonux.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210908044722.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/61585260522.pdfIn PDF document text
    • http://guerrazzi.info/userfiles/files/81130263915.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com/app/webroot/uploads/ckuploads/files/dugowomusafurubizenum.pdfIn PDF document text
    • https://printsolutions.printsolutions.bg/uploads/wysiwyg/files/81761159014.pdfIn PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/73655761625.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613226908b884---57296266180.pdfIn PDF document text
    • http://surveycook.com/upload/tmp/202109/file/88305551800.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=asvab+for+dummies+pdf+2015PDF 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_off0000d295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD295 11128 bytes
SHA-256: f8172c35b1d000f6fab9c067135bce7720005ee8b607011ebf334415081b65e1
font_01_sfnt_off0000ec84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC84 18164 bytes
SHA-256: 2ef24336d93351fdd34ffcf50d5c54200c21bfc1aafeaed56b17325b4009fb5d
font_02_sfnt_off00011bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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