Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47fffbd657999e2…

MALICIOUS

PDF

95.6 KB Created: 2021-10-09 05:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9f3dbd59c32bf48803c2b1bfb58cc048 SHA-1: 8aeb06f398044e9bdb160e1b1f303cd9aeeda73a SHA-256: a47fffbd657999e2184fc2805d21c5be4648c8169b287c7af642e4e1968f3c17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or appear to be disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were explicitly extracted, the structure suggests a link farm designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://blfimmobiliare.com/userfiles/files/vobatat.pdf In PDF document text
    • http://flyingfish-stay.com/userfiles/file/98680932010.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/mixev.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/kavutalenulax.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/zipuvosagowodij.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/52280971315.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16160dd4ec6f5e---dejeno.pdfIn PDF document text
    • http://livilgirls.com/files/6959279809.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/43249814084.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/vekamipelaka.pdfIn PDF document text
    • http://jogagongu.pl/userfiles/file/52782907739.pdfIn PDF document text
    • http://mallenmediations.com/mallenmediations/images/userfiles/file/66110137744.pdfIn PDF document text
    • https://gtijsr.com/userfiles/file/jezerilowodulonab.pdfIn PDF document text
    • https://rivieresoceanie.com/userfiles/file/46322802132.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/50989098002.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16157f9cc11adc---11245249181.pdfIn PDF document text
    • http://webbyshoe.com/fckeditor/userfiles/file/bepiwugutikeraligupaw.pdfIn PDF document text
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/xenedotumupufa.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/37419821106.pdfIn PDF document text
    • https://vocembalo.ch/userfiles/file/47032850582.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/xokagi.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/mapelubit.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/4332902599.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9355f5d533076404ba1da6c2643cf477/vedetimupipeb.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/diwezutinonukig.pdfIn PDF document text
    • http://rioairporttransfer.com/ckfinder/userfiles/files/10154202139.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=body+once+told+me+the+world+is+gonna+roll+mePDF 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_off000108b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B9 21120 bytes
SHA-256: 328834331396b298274d067bdf4ff9493fd42d5b03856927fb5b9248a3499dce
font_01_sfnt_off00013ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EC5 11068 bytes
SHA-256: 076a0d4682d59b52309e1d39619aea27ae43adb464811bc96b4eab40148bdc92
font_02_sfnt_off00015846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15846 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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