Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe18e880e693a69…

MALICIOUS

PDF

84.1 KB Created: 2021-10-06 05:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 61b80f10852452223270535758b81388 SHA-1: 492322b0de5447e83c3faafcbff2fe6f5307f839 SHA-256: 2fe18e880e693a69be152b9b5ec1e17505df2802a97e5430706f4fb0f9696c5b
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 functions as a link farm, containing numerous URLs pointing to external resources, with one identified as a disposable hosting link. The primary attack pattern involves luring users to click on these links, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cgeminfos.ma/upload/file/75148158194.pdf In PDF document text
    • http://csc0516.com/userfiles/file/20210909194921_mhgn7o.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/36814038571.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/63191584225.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/widomebojo.pdfIn PDF document text
    • http://lpxs168.com/filespath/files/20211005073641.pdfIn PDF document text
    • http://gotoippc.com/ckfinder/userfiles/files/xolawakolaresigixofineke.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/34481118037.pdfIn PDF document text
    • https://vatlieuchongnong.baohohoanglong.com/userfiles/file/80816953651.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/15572110205.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/givogumuzubezeju.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/rifepogorode.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/60125583010.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gidusowonifadi.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/liwozakavusowif.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/vanafupimajojoxuvofisene.pdfIn PDF document text
    • http://djk-winkel.de/images/uploads/file/pujajijubakujulipapimoret.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/mokikabetinipigesamumol.pdfIn PDF document text
    • http://stefani.cz/fck/file/50664576471.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nefezurisopilakirob.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/samafore.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5a048f36a45acdff77afca2a0ee74dfe/72192271643.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=the+painting+of+modern+life+pdfPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303519eec46---58389216014.pdfIn 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://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_off0000e274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE274 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8B 10740 bytes
SHA-256: c65fcf4f1f8960e25fb1c421fa42c80c70d4a9cc4658e35a26b8bd9477b126ba
font_02_sfnt_off000112c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C3 18616 bytes
SHA-256: bb4c5c477eaca7ac889a6cd5819138a165ff813e8ccd35b8626d436c114c236f