Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d80d4b9ef21564…

MALICIOUS

PDF

80.8 KB Created: 2021-09-20 19:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 944ce270d386804ba21a174b16dba847 SHA-1: b40b6f3bae18057f5dcb6451d74f55dd221f89b3 SHA-256: f5d80d4b9ef215649b5dbdfebac2a893854c9b3e672d6f5cde21cc3827ab603d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many hosted on compromised or disposable domains, designed to appear as download locations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it's designed to exploit users by presenting deceptive download links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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 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://5thaveseniors.org/userfiles/file/luxakop.pdf In PDF document text
    • https://baatco.com/ckfinder/userfiles/files/5889812641.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142ece99245f---narunalivarefejet.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/likamogalexaxonela.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/rusunewugigilusazovimo.pdfIn PDF document text
    • https://taybaite.com/userfiles/file/bakufira.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/tiwekodiroj.pdfIn PDF document text
    • http://budka39.ru/files/71738919869.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/wilomezebevidafo.pdfIn PDF document text
    • https://sistemagestiondpr.co/userfiles/file/loxufovo.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/levegenerorid.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/dexobanekitesilejataliv.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/lovidotidi.pdfIn PDF document text
    • https://onlinendttraining.net/files/21490909085.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/nudusofiropazuselulapa.pdfIn PDF document text
    • http://zatuchlina.cz/upload/file/sakutosapedijitibin.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/68941231364.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/fc29b262bbdc0b43809db9dfddf58c5f/66877132193.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/1a6124debc89b95ac0a7dae69e0cde6b/89261129703.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/22732332923.pdfIn PDF document text
    • http://sanxuatbanthinghiem.org/app/webroot/uploads/files/lutivujadig.pdfIn PDF document text
    • http://kovospm.cz/fotky/file/13638123026.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/11783760421.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/10282af3c326a1dbf9d81b78c6fa2cfe/53624117178.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=download+windows+10+apk+for+androidPDF 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_off0000d4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FF 10612 bytes
SHA-256: bb81715b4058d7f1a6af21cf838317f343e7bee42d71423863234c4899fcfcd4
font_01_sfnt_off0000ed64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10576 18856 bytes
SHA-256: 50c76e86ef1114ef222e57cdedf30772681c25efe44d88d467a73020205603f8

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