Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f1f4bad9ffaf65…

MALICIOUS

PDF

75.6 KB Created: 2021-09-01 11:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 634f950c681238b695b7201f7a636135 SHA-1: 6fd008a06749fe143fc2e3ae8b105cf07dad88ef SHA-256: 47f1f4bad9ffaf657e9e2bf7172ad9b66e53c6799f645a91acf1b1fe76c7b4b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It functions as a link farm, containing numerous embedded URLs that point to various websites, some of which are hosted on compromised WordPress installations or disposable domains. The primary purpose appears to be directing users to external malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://nomylo.ru/uplcv?utm_term=what+does+it+mean+when+you+feel+sick+every+time+you+eat PDF link annotation
    • https://careersourcechipola.com/files/public/buwisirafapenotamatetiv.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/kazoredusevib.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/28021129732.pdfIn PDF document text
    • https://printsolutions.ro/uploads/wysiwyg/files/finewipate.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/6a1ae8da43a4a5cc343a425e05920af1/notowe.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/88105974612.pdfIn PDF document text
    • https://deepankarbasu.com/FCKeditor/file/lefexamasotasomemetasibon.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16071e105bc8e8---wokopovapofufosu.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b272f1212ab---zaxare.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdac9518eee---japigesipa.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2b6cea620f---39688049576.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/lowajipolimivimojubitadub.pdfIn PDF document text
    • http://aristosaigonhotel.vn/uploads/files/govulejoroxaveweziju.pdfIn PDF document text
    • https://kaptenhoki.net/contents//files/jonilafododudar.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/madujelifojudovu.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/ab1a77b47af545b5cc2e3407241ac1fe/zedesureposilixadejagus.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/jepifutexeb.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160983150e3ce5---faxirutibu.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/86551809594.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/vamifukibebedelowikebif.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/ropike.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/nuwifazedonusuwus.pdfIn PDF document text
    • 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_off0000c3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D0 11192 bytes
SHA-256: a609eac9b23c905417a3d568935f09331abdd735e5bcd191624803e800ded0b2
font_01_sfnt_off0000dde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE9 16776 bytes
SHA-256: 6306b3c270d93686205be027cf29a2d474626ee84bd7821ae254969466a2e2ac
font_02_sfnt_off000108b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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