Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25c62d8210e6ec7…

MALICIOUS

PDF

72.7 KB Created: 2021-07-02 14:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 9f3c5b4fa18139386579464a322f6db9 SHA-1: 44549a5a0b5c0bfe883b68488cbcf94b77d93a7a SHA-256: d25c62d8210e6ec726d30172f4f200339af33327bf12de7e78b08dba95c354c1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. The document body is unreadable, but the presence of numerous external links strongly indicates a malicious intent to redirect the user.

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 https://krisoc.ru/uplcv?utm_term=countdown+70+minutes PDF link annotation
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607fec3f4ec8c---numasenototuduwamul.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/75022087538.pdfIn PDF document text
    • http://cohensevents.com/clients/74638/File/tizixuro.pdfIn PDF document text
    • http://bracyfamilyreunion.com/clients/c/c2/c2db1a97f769835965582c74015c7782/File/medexemowexexo.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/rinufazo.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0e5371d39---67078884331.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/e3f002445dde14db20e2bd18be78f821/999515059.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/46073400288.pdfIn PDF document text
    • http://rahway1968.com/clients/5/53/53e48f2724afc57738bbbcfbfdbdad27/File/29416215706.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0626912001621874721.pdfIn PDF document text
    • http://simonide.org/userfiles/file/51686424738.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/92a92981f10353c0b36691843f962fa0/37112880693.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/jozin.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97a1aa1464---semejijuv.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/bedudipowakopoguvabuton.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f8242b479---muzinixitadenoluwubi.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072632e4a4d8---21649112251.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/niwapokoxosogopizesum.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/6909a6ba71fc2f3bfdf2f9242346b824/pigojeforan.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/2c5e914f9fce56367e5bd9c063d15590/wogivubiponajikiz.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c135d788c4b---77589859997.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160783604ef536---bivisaxaxi.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/pv48pg5qmr76tat5m6nlf5gq6p/88742369706.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940f492ca3d---77155502946.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_off0000bbfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBFA 10488 bytes
SHA-256: 81148bfa02fdfc5c53d1bce9120d79e6d08eb8885e76d1b307578ec1ab98a94b
font_01_sfnt_off0000d3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F5 16116 bytes
SHA-256: d14db51674caa88b7bcfaf4f18127f25e65a478bf837e65dd40f2847a8141a4b
font_02_sfnt_off0000fda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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