Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9420186fab87e13…

MALICIOUS

PDF

88.5 KB Created: 2021-08-21 04:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9fdd7ce4fa7d40b1a04a6dc3a544a641 SHA-1: 49d909938d589c9065bf73ad480ffe2e316c7272 SHA-256: e9420186fab87e1356271743eead4f05f1adc98048feaa2f60800fc9399642e2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and linked URLs are indicative of a malicious campaign, likely involving a redirect to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • 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://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0bc8661cf8---narapukufugusu.pdf In PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960c6f6e8ad---jajos.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50636868624.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/3644958284.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/xevuvujuwugufofumuw.pdfIn PDF document text
    • http://marty-triple-m.ch/inhalt/files/80597579231.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2599ba949---fubuk.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210708_CA670AADF2E6B1F9.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/24434425685.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/bb7b269d5b20ecb94595dc6b4ff03f94/tupunafiwatexoti.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609415346bf57---jaxiboso.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210522200815595879n8vp46.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160906af7de522---92776461694.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608635d9217af---vevovepatixediwu.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/iir013tqbg4kf6mg5qrtq0m5s1/32201956335.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16106d309000d1---zonapovavadegokirukifini.pdfIn PDF document text
    • http://ipllaser.in/uploads/xajejagabalaxupiw.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160999e60a675e---58958277143.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/fanijunapon.pdfIn PDF document text
    • http://isystem.hu/ckfinder/userfiles/files/5919606914.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/tqcbv1g5dd3uu5efampmnmn0t3/rufomu.pdfIn PDF document text
    • http://mp-journal.com/media/file/bumotofarikudemazigoroji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=cuales+son+las+diferencia+entre+una+carta+formal+e+informalPDF 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_off0000f21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21E 10768 bytes
SHA-256: 7c77f0da4ed80fe4b44b7b1f3bbbb55bcc8f9b94f30d4d254856c723ae027dfb
font_01_sfnt_off00010ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F7 18072 bytes
SHA-256: adc31e952572c3086749bb3fd2bcc250d2be58aabae52182774cfbfbb7b560a1

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