Malicious PDF — malware analysis report

Static analysis result for SHA-256 18cc88c25f00b5c4…

MALICIOUS

PDF

84.2 KB Created: 2021-06-27 16:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 09f1a9484d634482d53fd5b4d73ed685 SHA-1: 54b783de4344be20e2045b2b4ffa99237a034ee0 SHA-256: 18cc88c25f00b5c40879674ca09637307f2722f1515193fe3fefad34f98e0673
156 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to direct users to malicious content. The presence of external URIs and link farm heuristics indicates a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://cructi.ru/uplcv?utm_term=fall+guys+game+crack PDF link annotation
    • http://staresecurity.com/userfiles/file/kufifozokorosejop.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/xadavufegugunaselidapobin.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/191f8db5b356c1c88bda9c027c086f8d/guzuwezoxutadimonito.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/7dd4063767db0da4c593d616acae2c7d/jadiruxewiwuz.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098dbb75bcd2---sarukupadefuvuf.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/vijenamux.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/371f2180106aba3d023cd1c449eaae37/viximugubuzetujunumenejo.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/5bc26a1bd24565f42feb8cbb17831eef/86727150143.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd65d862f6---nutam.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608036f712626---kiwudisor.pdfIn PDF document text
    • http://mousike.it/img_ins/files/tagapux.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160727bcf848f4---wujoregipumi.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/66125225537.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/gijerakobebij.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/284bc83d628b79b310a50631c95e5223/48338714415.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a979a3f50a---jojadadomazediresabu.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/f2dfc266b13fd6ab56fe897d0243bcce/jibaxukimezabuwirev.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/bitovutabenokitorakilelu.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/texivilawuz.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160771fba5925a---pudazukofer.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/9e3a5b1a4c0909e61498b757f326bb18/mipevad.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/8e9410e0005d498afc39513ff3309ba5/merurinodurivasejijoteli.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001017e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017E 16544 bytes
SHA-256: 79d11ba65128b5f12034fbafe97ded46df37763d475d13356ed19151b5219913
font_02_sfnt_off00012c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C37 10444 bytes
SHA-256: 9a2c3a1c09c5cc544cc6ad4fc02d9dbc41b58b025ec55cacc5dd03760479792a

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