Malicious PDF — malware analysis report

Static analysis result for SHA-256 89986508cc84ddcf…

MALICIOUS

PDF

88.2 KB Created: 2021-08-06 16:35:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7cdb39476efa001293f9462766dd36c9 SHA-1: 6917359b063e6d2a7a2b1c149176bb81820aa836 SHA-256: 89986508cc84ddcf871f7000bc52ddd7f23be4234c2631088c2478522efc830e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting domains. These links likely serve as a lure to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://tgtech-auto.com/userfiles/file/46629475096.pdf In PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/2d276453924f06b652c8a542dfded201/wizuxu.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/50080195584.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/noruv.pdfIn PDF document text
    • https://badoza.net/userfiles/file/rinewiniraxawe.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/93680602835.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/vorutidepiwinotuwiwep.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/23751632742.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/1352716872.pdfIn PDF document text
    • http://suamanhinhlcd.net/userfiles/file/63537627268.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/cc9b8b6734611597d656afd450756bf4/68493938788.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/74241409615.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/fd5vd69nh5gkrrak6lq9ul9aso/retirapovotubaride.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/46362168584.pdfIn PDF document text
    • https://warungmimpishio.com/contents//files/gaban.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/694f11af0178f6fdde22ab21108c7330/24724912413.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/22/file/20210522_183222_181.pdfIn PDF document text
    • http://sutphinsgermanshepherds.com/clients/21958/File/89304124859.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d343f0bf84---12233874055.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916860530f6---98627460939.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/d66c2628de46f89721da727ff1592831/16125197296.pdfIn PDF document text
    • https://bulgariapools.com/contents//files/59880629766.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=arithmetic+series+practice+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_off0000f2c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C4 18320 bytes
SHA-256: cd36b5654e5c4e87c0edf007a6e322ac2da40c77478f47ccc819d7f6acf5f051
font_01_sfnt_off00012366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12366 10596 bytes
SHA-256: 86ed21f1f089d13f2465c3371078ef97690241a7cd88579d6dfae9f37c1f5a68
font_02_sfnt_off00013ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1