Malicious PDF — malware analysis report

Static analysis result for SHA-256 69be2999c7922425…

MALICIOUS

PDF

69.2 KB Created: 2021-10-01 05:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: c5f3b9476b35c60a24db0bcd9b0404c5 SHA-1: cd78fee7673437e9f1ab364a266e612f4438b350 SHA-256: 69be2999c7922425d4d87e66da2dfcd80b2f2f7d401454715a004a58903b1185
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is a link farm designed to redirect users to various disposable hosting sites, with one URL containing 'grand theft auto v' in its UTM parameters, likely a lure. The embedded links and the nature of the heuristics strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 http://naturpix.ch/cmsimages/file/wofemedekenimadixe.pdf In PDF document text
    • http://ilkyoukais.com/Images/Media/files/80103247829.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/vixenumazolo.pdfIn PDF document text
    • https://angkalaris.com/contents/files/kabub.pdfIn PDF document text
    • http://centromp.it/userfiles/files/93382425323.pdfIn PDF document text
    • http://megalightgroup.lv/uploads/files/fuxiz.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/99818018797.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/88002127787.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/64863827653.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/tiwupaxisupejivokemo.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/34779923033.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/93704351223.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/nm5ajlqj2vde4ne3p9u68lh9n0/gaxizavi.pdfIn PDF document text
    • http://keitbg.com/images/files/nabigimim.pdfIn PDF document text
    • https://sangogiaphuc.com/admin/webroot/upload/image/files/63915528276.pdfIn PDF document text
    • http://rowerowaszkola.pl/imgturysta/files/75199148551.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/11381685727.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/xoguwamov.pdfIn PDF document text
    • https://interconformity.ro/images/file/14210821455.pdfIn PDF document text
    • http://tulga.ru/editor/files/61802651024.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/20819961216.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/d27cf8d47c684511ab93b8981a71b7fe/sisizedalaguzenum.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/lejofofavedigumipurokos.pdfIn PDF document text
    • https://parkettworld.com/upload/files/11591902120.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=grand+theft+auto+v+imran+sarwarPDF 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_off0000adf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADF0 10864 bytes
SHA-256: ae4e8b4bc799081a18576a9d963d07069b53ee383fad44cf70322dd43cb86c69
font_01_sfnt_off0000c6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F0 15396 bytes
SHA-256: 8e8a0c9be36e741d00b01b5fe23e5b7ba07862e18e6f9256372c20daf3958936
font_02_sfnt_off0000ed94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1