Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab9eb414427db0b9…

MALICIOUS

PDF

82.9 KB Created: 2021-09-03 04:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 38fd091ab7158728af6e23601371d800 SHA-1: 680b8dc92453957b51bfb0d6a88d3b86c5db229a SHA-256: ab9eb414427db0b90cfb49687dbabab85c7cc28c846b493f148dd2e84db6ed90
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised websites or disposable hosting, suggesting it functions as a link farm. The presence of these links indicates an attempt to direct users to potentially malicious external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/p16c3tt5akpqrhbgsm5q3pjga7/jumevezokobelosexo.pdf In PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160d9fd47ce98c---16072410291.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210527215346.pdfIn PDF document text
    • http://mfahk.com/upload/files/65470145308.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c0d7ef4d98b0e0aa4346da3a276922a6/55965523019.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/3cc7f9eaba32748c868abb4cb0b1e3c7/kifokuvexadadiporemapasol.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb89afecf91---12990078203.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071eb9ff3196---77985028726.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/6d721ba9c141c8bbb453e82db2654061/65928304462.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ob5ufb86iarsntcr43pfuhpfl6/jatajufidovafanadonafut.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/nozijenidifafezugudixuduv.pdfIn PDF document text
    • https://razredna-nastava.net/files/26475567036.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/161315a5f53081---92945145579.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/83407297809.pdfIn PDF document text
    • https://proxus.nl/file/gimarabusobefubiwuboko.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5888559608.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9dbc7d380---52673060951.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/97107599982.pdfIn PDF document text
    • http://fedoro.ru/upload/file/dawibadobedezini.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/wagoderek.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/f0240db8bb65f3a583d1f2669d5b9250/16699408079.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/0bbf63a9f449e9fec4789973e47f98d5/rakizifetodipi.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/jejakefimokuxuzulobogudin.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/897ed2007ee23c7878355978319db092/xixivewexaratulok.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/83798176477.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/531649c30524823c9b8578e5122f5b7e/kinodowewidegoxalafos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=amazon+fire+tv+user+manualPDF 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_off0000de61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF673 18212 bytes
SHA-256: 746b65d76291c16f14b7f46fcd444e9aaae5adab092274c8b32aabc9464ff147
font_02_sfnt_off000125a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A1 10580 bytes
SHA-256: 859101218f098ab602ef909bf631bf78fe69a285c65ea8b987bf4c715339b2f1