Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ab37487a720dbf…

MALICIOUS

PDF

84.6 KB Created: 2021-09-07 00:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: f4a47ccd51fe87a8c3d54a35dc6dd93f SHA-1: 3e72af4e139cb40c60a2c1c4fee678ba8b18aa2c SHA-256: 80ab37487a720dbf91c6968862d0d543bd12df37199f751fc93bcccd3e4ee0bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links, many of which point to compromised WordPress sites, suggesting a phishing or redirection attempt. The PDF's structure and the presence of link farms on disposable hosting indicate a malicious intent to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d54dcd8eaf---28560093371.pdf In PDF document text
    • http://huanghels.com/filespath/files/20210821142148.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b458832456c---80580637075.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/35912681544.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/a2de02e8d906af2309ef7d897ea4da1a/27142790381.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/lvgiur8rfu4374nsi6ctd3mv0h/lofusetofanulumorupoluga.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210708214458953.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/71068742113.pdfIn PDF document text
    • http://bienbao.org/uploads/files/maxetepizuduzomufeza.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/5564273933.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/cf3fc5667e41f2b9ae775e4d0ca295df/82060533007.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/rezazaze.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/seposexenuzisezatare.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/xuwepenobogufa.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nuvukisumiluxotok.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/74913884265.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/fufetafolexodapabumitovub.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/ae849a59bc9f98660ca04dc428983d00/pipuk.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/705d12b561669768027a207c341dedd4/puluruleviwimuvuzokeji.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8ee183965---22101689269.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/dilalimem.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16082c4079cac8---84108135633.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d79b6a1a4f---sanirojivupodedogeregadol.pdfIn PDF document text
    • https://digireg.pl/upload/21526992374.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/46520fabcc2786abe43c231af52c9394/samifabupuvubawujojoti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=basics+of+networking+book+pdfPDF 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_off0000e4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E5 17588 bytes
SHA-256: eb123d4cecbfdf51dbf43dc65194c7fce044ef8c445895e3d3662739e51187b9
font_01_sfnt_off0001129b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129B 11120 bytes
SHA-256: fb4d6939e4cadbe524851c066db8ab7153cd2702beffc2f13020c1fe1d21bbee
font_02_sfnt_off00012c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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