Malicious PDF — malware analysis report

Static analysis result for SHA-256 577209d7e7d49d54…

MALICIOUS

PDF

82.6 KB Created: 2021-09-17 20:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 69e98c98c59e43c4eb41c802fd655e68 SHA-1: c4ecd67316c20a9c22ce33134328b9b2e5256354 SHA-256: 577209d7e7d49d5490370bc948e9f1aa256c10d6b100807646e5738381a74692
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one that appears to be a search query for hacking tools, and is identified as a link farm on disposable hosting. The PDF structure and embedded URLs suggest it is used to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://huntic.ru/uplcv?utm_term=beach+buggy+racing+hack+apk+2020 PDF link annotation
    • http://theponghop.com/upload/files/gipajoketilaxokavirilemos.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/51450580323.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16140e85b2e8fe---89286507260.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/damoxemenidupamizorod.pdfIn PDF document text
    • http://konikanarrowfab.com/ckfinder/userfiles/files/8209734907.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/82124747774.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/9911512229.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/ruviki.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/lolatatuzuwejefojivil.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/22527999254.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210910060820.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/betumexufejiman.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/fopojanabetewamipa.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/81376158547.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139adf6c7979---vemabag.pdfIn PDF document text
    • https://fratellifurloni.it/file/46342555036.pdfIn PDF document text
    • http://astprom.ru/sites/default/files/file/riremunekironiru.pdfIn PDF document text
    • http://morakothotel.com/file_media/file_image/file/nedezugapimuduzanulawuror.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/37595687159.pdfIn PDF document text
    • http://hutnia.pl/userfiles/file/97090068039.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/vewelufojo.pdfIn PDF document text
    • https://unaizahic.com/Files/files/kogoni.pdfIn PDF document text
    • http://zawodydrwali.pl/app/webroot/userfiles/file/juxoxukepatoxor.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/88116766405.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/225952755101631575323.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_off0000dc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF450 17796 bytes
SHA-256: 6798f416fa4bc88adcad090f5122d6d3d1fd8a3491f84d66b452a6c5a6fc4b36
font_02_sfnt_off000122fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FE 10964 bytes
SHA-256: 119600d4140963b8b82ef8fb71f5d6e9e7e4fb321600ed9d5f4f08144f11344a