Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad8436bc3a6e180…

MALICIOUS

PDF

86.5 KB Created: 2021-07-03 11:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 171438018228d4a19a8d2c8d3f557292 SHA-1: 19babc662de5e5f69f1e01f131ae0b44b09cbd83 SHA-256: 7ad8436bc3a6e18097d1587a002bc21a35b1d7f2a240febc41cc3c4aa1886ee4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a link farm pointing to numerous compromised websites, indicating a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. The document's structure and embedded URLs are consistent with a tactic to lure users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.huntsvillepr.com/files/files/71155788500.pdf In PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095129883b20---22845673706.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/8g49i0ubvbler5p1ajikg80s6j/95197908085.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/0626ee29ebe13f8669ca42ea7051a602/futasajoguvamikufifo.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/volejisuxa.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092c64bf048e---53536342451.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7b3457eaf---76332044023.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/gufuvez.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/91908550614.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/fituwugisevidig.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e797203746---51314691857.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/galurik.pdfIn PDF document text
    • http://becucci.it/userfiles/files/96748990690.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160766b00cfdd2---gusowivawewalewu.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/2587827888.pdfIn PDF document text
    • http://aven.su/userfiles/file/23110104759.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16098773317a20---jamavenudadanegofex.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbaaa4347b---sesixiwajoziloke.pdfIn PDF document text
    • http://stlukesmn.org/clients/17773/File/toxoxadisezodozefof.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/sesoletofotuxatukuvegona.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/7823498515.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=similies+about+lifePDF 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_off0000ef5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5C 17612 bytes
SHA-256: 2843c26bffad53d7bfc58779c70e4934d65b5b5b06eba8716ef202ef807b2549
font_01_sfnt_off00011d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13581 10488 bytes
SHA-256: 2d6e505c1ddb6a39f3193961bd1668c850a03e977780ac8ff347515fc36f19b5

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