Malicious PDF — malware analysis report

Static analysis result for SHA-256 202f88eb2ef190af…

MALICIOUS

PDF

84.1 KB Created: 2021-09-11 17:31:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 567be28797d528d0e6e0e1cf5e5ddc47 SHA-1: 590263051ec08fb1ccb1c5ffca51fa1c9593ad35 SHA-256: 202f88eb2ef190af44c848741fe8d5dafee7e92b9fb6ac6e1bee354374b044cd
126 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous other PDF files hosted on various domains. The presence of multiple unknown URLs suggests a broad distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://3q1p.com/upload/file/210903123113712626aptvdhxgkw5m.pdf In PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/pugovewowufevexazexelato.pdfIn PDF document text
    • http://ymmicro.com/files/files/kilowamotanasavanet.pdfIn PDF document text
    • http://labsshop.com/d/files/fokugerilani.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/jovokuso.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/gibumexo.pdfIn PDF document text
    • http://larben.cz/media/images/upload/file/77076768464.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/zanipuzitiliro.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/33867695049.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/bitawaxuk.pdfIn PDF document text
    • https://esofagopisa.it/userfiles/file/98320474632.pdfIn PDF document text
    • http://xnucleus.com/members/member_images/files/tavazu.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/fumazotelaxox.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/39927366173.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/2443133892.pdfIn PDF document text
    • http://devison-matras.ru/upload/file/figudo.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/d4440e57468678d48ef8a3778f185b67/31788548721.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/51684195340.pdfIn PDF document text
    • http://americasbestwingspa.iorderfoods.com/uploads/files/zuxawapiwabuxo.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/37456853347.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16138c2fdeddb2---51099944962.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/xogakaxametebe.pdfIn PDF document text
    • http://roseeskin.com/userfiles/file/20210904215931.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/fufadux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=android+phone+call+recorder+app+reviewPDF 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_off0000e6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6ED 16872 bytes
SHA-256: 7950ebe9135e7a09de63528aa66473e9f63eeebfaca4f0322b96c4e0ce1612ab
font_01_sfnt_off000112aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC1 10480 bytes
SHA-256: 4a4d71b1b7b9636bd835c7e6c8dedbab01a1c745fc94906781994ebb2a5075b0