Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe474b1dc00b0951…

MALICIOUS

PDF

85.4 KB Created: 2021-07-14 05:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 187049ab200a1d40be42487fb6d19471 SHA-1: 17090652b1a0c16d851afb446b87a051a755d926 SHA-256: fe474b1dc00b095134c5de64cbf13d0a021dd9c50c9e1c1bb8e932972795c6fa
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to domains that appear to be compromised or disposable hosting. The PDF structure and numerous external links suggest it is designed to lure users to malicious websites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://assytekservizi.com/userfiles/files/pijegugazufufaso.pdf In PDF document text
    • https://appfacile.it/file/zasadozabopede.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/wemagivexe.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/gb7947esldn2rinegqpt36q9se/89916259222.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc0567eae3---40826702934.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/12e78d3b232f2d160373785f2c58c7f0/nubefotovobibedajumogivej.pdfIn PDF document text
    • http://unseretochter.ch/images/file/lifiza.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/mipemibijalusi.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/67983063795.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/jipiwosuvowuvuneg.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/88803331747.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d57b5878f3---ranajena.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/2cbeigplgoegbffd9iseq1l7e5/vejusalorezebudefal.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/tetirasugejekifakup.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/71562568767.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/785acc7e7ba6a390f234f24b916f9f88/49221593786.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/55514676435.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/4as45oifdbcvrc4knh2osiuel8/39507850680.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/jagirevepularivumuvekuni.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/op4ib4cilq89v86suve2gsrbh5/13849933062.pdfIn PDF document text
    • http://kme-kme.cz/files/file/55488918434.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef4cf9f022---9658638947.pdfIn PDF document text
    • http://premium-h.info/files/files/jevoj.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f4a3eddef---96394439718.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/kikiladatozagexiguraver.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=synonyms+for+canPDF 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_off0000ec95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC95 10320 bytes
SHA-256: df6636a63398fe44bfe31482a0e5878d1e78dc2a729840ee5ca0bdadb6d3135b
font_01_sfnt_off000103d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D1 17140 bytes
SHA-256: d38a3bc2293af22ffb53e19697f269b5c0524c27dfc949bd98b31dfadd3a0f4b
font_02_sfnt_off00013042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13042 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1