Malicious PDF — malware analysis report

Static analysis result for SHA-256 5506ffe5d04b06a2…

MALICIOUS

PDF

87.0 KB Created: 2021-06-26 11:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9f2b61deaf000092adcf8c8ec1b01d2e SHA-1: 80a5ebda65159b6c4217583a2496c7f016193fd0 SHA-256: 5506ffe5d04b06a21547fc77fbbc93d875ac75e1588b9db06194a02ad3fde89d
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://digitaldaya.com/imagenes/file/41899833566.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c3a76f384---tupedoxanev.pdf
    • http://almoheetmanpower.com/public_html/userfiles/file/31125765984.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aae86caf618---lupofanesukuregu.pdf
    • https://actor-conseil.com/files/file/35737105980.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0543a2463---bifoxenivugusubewiwi.pdf
    • https://moto-trend.cz/public/files/fck/file/rumegofo.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/7s3dlisb2afvqjp77tc49p5e4l/61853045242.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdc18c9170---loverurixurolupejos.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba4e7c4bee---logebupajamozeb.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/a8e4cd9f704f16dbc5f2e10aa2f05ee0/kajolilonugaforab.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/8gd21ev0311uid3i1fe2v0ieg4/45289223757.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d12d62860---13792347888.pdf
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbf0424936---93759007335.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730c02cd6c4---20760469302.pdf
    • https://hanahana.vn/media/ftp/file/xipumef.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607768d9eb37d---25458321510.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/07891d2bdc35aad0968e95d3c3f6ea02/9951990156.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606cedd374035---koloziforokumuj.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160b27690564c2---25906263275.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/272654f925ef4252c0ad10eb34675ca2/62748504308.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+hack+someones+adopt+me+account
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eddd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDD 16792 bytes
font_01_sfnt_off000105ef.bin
7133017617dfb1c9bcd30d9379318477ae30fdd987fa9f4cbd2a915b2fa6db0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105EF 17700 bytes
font_02_sfnt_off0001348c.bin
4cda6f3a66676db3f876de0c40d33b335ad67002f8c16bc1f68ef25293f84e67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1348C 10808 bytes

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