Malicious PDF — malware analysis report

Static analysis result for SHA-256 01971e49c4e401fc…

MALICIOUS

PDF

79.0 KB Created: 2021-09-09 03:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 540701a7e7a7166a82bbe01225e9f83b SHA-1: 2b0ece9882b13c961302f186727005f2d4d5cf15 SHA-256: 01971e49c4e401fca7bb9761ffe0ad3354231a3166aa4b8ddda77565b3f1c0ff
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs, particularly those on compromised CMS uploads, are likely intended to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/161374950ced06---52495427122.pdf In PDF document text
    • https://leo.tw/upload/ckeditor/files/14462576459.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/lunuwajelimupezavujep.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1630493304.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161341e8959ef7---xizexakowivinesu.pdfIn PDF document text
    • http://bdn10.cz/files/file/nerumajatoledekexa.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/tesaguzupirosikobakukexi.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/wewajuwawuxadixaxawi.pdfIn PDF document text
    • https://tefen67.com/userfiles/files/49055383595.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/dixudoluposanovutixibo.pdfIn PDF document text
    • http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/ruzexajutar.pdfIn PDF document text
    • http://ambulatorioveterinariobubiniregini.eu/userfiles/files/95502877257.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210903105137.pdfIn PDF document text
    • https://net-mex.hu/ckfinder/userfiles/files/18006219422.pdfIn PDF document text
    • https://cobaltinc.org/userfiles/file/61042725466.pdfIn PDF document text
    • http://khocabien.com/uploads/files/doxukinasekixotafix.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137559498a37---bitumefuped.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/detudawe.pdfIn PDF document text
    • http://phonphangschool.com/upload/files/sisabuxesiwojukedube.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/69a77e2202fc8e1e5f07ba4fcdbf977a/26939075116.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/kunalege.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/xuxodepufazodizotozulo.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/67382250821.pdfIn PDF document text
    • http://rayer.cn/d/files/godikipawoj.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/paviwepimowokewozejuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=magnetic+pole+strength+formulaPDF 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_off0000cf59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE770 11020 bytes
SHA-256: fa058d9418180d650211397ce0cf297f5def9feb62525a18e7e53c235d6ef3f0
font_02_sfnt_off000100e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E2 17772 bytes
SHA-256: 149cdc731b08cbd3970f48f189c577af02f020d8894926e07b81e31cfa3ad041

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