Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e16bb7455f33584…

MALICIOUS

PDF

84.6 KB Created: 2021-07-04 00:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7cc21d0978223adceab142e8920345f7 SHA-1: c2a62bab6d4524bcf4df9283cdb3e96daec94060 SHA-256: 6e16bb7455f335846ddfc3358437c92b1d5b1babda9b2c09fa6b5768291a9783
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress sites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure as a link farm is designed to lure users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/ecgj0dle6hg9oo70pabarubd39/55132721660.pdf In PDF document text
    • http://szsahsh.com/uploads/files/86249003173.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/65074178085.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dab45c84fc2---garirevuzazawe.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/12918393749.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/14671971115.pdfIn PDF document text
    • http://aci-immobilier-douai.fr/userfiles/files/lofipagakiseganopegu.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7034cde5a7---vijipe.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877fbed348d---54184195399.pdfIn PDF document text
    • http://orhs89reunion.com/clients/77823/File/veraw.pdfIn PDF document text
    • http://qca.ch/userfiles/file/39284232895.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097971f179fb---kupasojakexopeviweman.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/poken.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/rckbtmf99umnelqqjce2hk9eqm/karuzeb.pdfIn PDF document text
    • https://ikima.fr/uploads/file/teposimezepef.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160828e60e0057---84655890786.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/jupoduxu.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/jamadud.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/8bc26a92d5ac3cc97c50cdda61194651/jelitirazu.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/15a5d635d69e88449a51b45b1556a850/famez.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/684c1bca4296bccf99f1021028192497/lewigigagutojigozewumaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=moral+would+you+rather+questionsPDF 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_off0000e6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F2 17460 bytes
SHA-256: 9efd7e2ece2c29a0570423e44a8d16af11ba47bcd94ec8d922e2fdc5e0b337ee
font_01_sfnt_off0001149d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB4 10784 bytes
SHA-256: f0c14e7ae254937a8d68275bed792e9486b200e64bfb9e585536c173cd2836f0

Open this report in the interactive analyzer, or submit your own file for analysis.