Malicious PDF — malware analysis report

Static analysis result for SHA-256 420fbf8d05e76e4d…

MALICIOUS

PDF

85.4 KB Created: 2021-09-04 00:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 02c9ea7f84f9423a1ee1edb0e64edb46 SHA-1: f71946444e83dca99f86221a4586a0e5613f5d4e SHA-256: 420fbf8d05e76e4de97b5992c4cb267799ecbd9a6fd335045b274b0e2aa91e24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://goldenlinejsc.com/userfiles/file/81093210556.pdf In PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/be99b69d7e081f5e9ab0853d7fdaf793/lolipavibarebe.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/wusaroperaworilewikefu.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/7115537ddc79ff464a9985543a16daed/49845194460.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e80d11ef64---dazokozuparexexisu.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160daf5c727e4d---47839983445.pdfIn PDF document text
    • http://borisovhlebprom.by/var/upload/file/gusupezofamojexigok.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/areh7fblqvl7ad1di97sipe6lo/32097231597.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/9754502321.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/23779053008.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d694ef7b281---lowanilafa.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/tinozasabixabum.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/8084572b1966af95a9fda9114aa48197/94548624334.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffc3514038---rifipufibeme.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160827a41d159c---85445462029.pdfIn PDF document text
    • http://fxmeat.com/upload/file/f9a765655c826cb5685b7c0d5cf72a13.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/9484784611.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079cf7956e47---sobomizuwososaxinel.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/69066954939.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/64667887623.pdfIn PDF document text
    • http://www.ctmmaximoravenna.com/ckfinder/userfiles/files/91243364388.pdfIn PDF document text
    • http://www.asslar.de/downloads/zaroroji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=hpi+baja+5sc+parts+manualPDF 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_off0000e6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AC 18236 bytes
SHA-256: 0fa3eaf4957ce17878a20346a1922b30cb006c25bd326bc088c1506a9020b866
font_01_sfnt_off0001163e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163E 10776 bytes
SHA-256: aaf7326e1b0159db18e140f048ff694c0ca57bdead025b188bf010bd80c75a68
font_02_sfnt_off00012ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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