Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d454d45c021271…

MALICIOUS

PDF

85.3 KB Created: 2021-08-02 22:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8dfc51382b8e549f63df1b2c8ade3b82 SHA-1: b9243b761f0b7ad48458274583706892981c6d50 SHA-256: 10d454d45c021271ae1aefe7fa839850263bf6835fdaee4927a4e8aee577c138
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the nature of the links and the detection suggest the PDF is intended to lead users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://amuseonline.com/absite/userfiles/file/relinabaw.pdf In PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/9q8aasqk47e5eflm087cv2atk8/51573965997.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/pogatosevewelad.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/birumasudaxiniji.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/38037624529.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/raxefonidometaketak.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/de5ouk40ffl1e7mvb1bb8fnp7a/44927941127.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/pobara.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/4593025104.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/1846573627.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/95a0ed5c4764cafca76462e6a3de50d8/xuxexaletuxonidodevemi.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/769086308.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/dulifivufunowalovefaj.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/zofudalasogolugilimasir.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/23816a64f5a2d618ed0230ba8cda4cfd/rerexezexokofafu.pdfIn PDF document text
    • https://bjsteelvietnam.com/upload/fck/file/61785250269.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/nalomezuxopowasixof.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/1954a33d6a3166bb8ab79b25b2e396c0/16969079692.pdfIn PDF document text
    • https://mytopics.it/uploads/file/werufib.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0bb650217a---mirujomesinopigijeras.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d0123186830---jowutapigobetokunemik.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d5b9f1b1550---36148225881.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/89071937799.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/06d839ce28cb281961211494716d3a9d/bobedaraxugolebifojesum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=what+does+the+6+of+wands+reversed+meanPDF 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_off0000eab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CE 10792 bytes
SHA-256: 9437d21da6b741cc49eda5c27796ba03e91b3b863720c13cf00a6daac87a8acd
font_02_sfnt_off00011b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B96 16784 bytes
SHA-256: fc8c8f77ace3a85ec10195550cd1644a210ae84368777223ad9a209a43c70d24

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