Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f9c1b79fe3eed7…

MALICIOUS

PDF

80.7 KB Created: 2021-09-13 03:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 40704aef082daaec76b8985b352bef81 SHA-1: 1e2af566c6ef9ee69edfa1179fc81691b83622fa SHA-256: 62f9c1b79fe3eed72fbd4c350ab1c8198e4a096ac26d7bdb613b578852a9e6c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soudurelauziere.ca/upload/editor/file/jarinojesaxonegufugowoj.pdf In PDF document text
    • https://bauarch.bg/files/14234592812.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210903230530.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/59118879993.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/bijumamigafuwonugit.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/18362433791.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/161387a8c4d75c---68962862692.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613afb0be5007---sedopelisazelura.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/57498604075.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/vowudadifubukuzaxubawezox.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613e800429dc6---kufijobiniz.pdfIn PDF document text
    • http://dreamscar.eu/userfiles/file/bajaveduwupuvajesag.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/zobutelinovamuzad.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/67618695490.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/c5502f13cff435927762cf3c0fe93970/jepijed.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/79095530187.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/jisisidewo.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/63624563965.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/61884b80fb0595f205f98fa7082554a6/zatuki.pdfIn PDF document text
    • http://tgroupsrl.com/userfiles/files/jatuzus.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/6942343424.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/6bd43grlffv9e1s86d7dd1f4l3/76332756093.pdfIn PDF document text
    • https://shoppingplanet.cityplanet.ro/ckfinder/userfiles/files/1613927152.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=ice+cream+sandwich+versionPDF 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_off0000d72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72C 10596 bytes
SHA-256: 5afedb4636c2896b99f8ee1f4828a5903bd30b4f0fdd085d640f29934094485f
font_01_sfnt_off0000ef39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001074b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074B 17944 bytes
SHA-256: fb09dee86fe822932c08ceaf90a6c1e98eafde38e976b09773263f256f36171c