Malicious PDF — malware analysis report

Static analysis result for SHA-256 504997c1c56eaaa6…

MALICIOUS

PDF

81.6 KB Created: 2021-08-16 19:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fcfd0a6415a91de6a8f48f40d8a7987a SHA-1: 00fb68cef21bf3b42f370e986ae3b7396c847138 SHA-256: 504997c1c56eaaa6376d99ab3314c548c38539c3cfb52e5919f5e3087e7f58cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs pointing to potentially compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of many external links suggests the document's purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://crysiq.ru/uplcv?utm_term=how+to+collect+group+funds+on+roblox PDF link annotation
    • http://bowlingkillers.com/imgdb/files/18448305579.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8a17b14d1---mopamakopilopixaw.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/8bf6521816819a34613e9818efa89dfd/70703276644.pdfIn PDF document text
    • http://jogamiskolc.hu/ckfinder/userfiles/files/44815995947.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/559f0215c76228ac785c2963b647dad0/jodizidufezapenabade.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/84f985429d6878f8e313759ee03eafbd/28353589438.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d63a4c2d1---tonozoxazerugib.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a37382a8363---kajeraji.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210804061127_t72m2z.pdfIn PDF document text
    • http://aimic.com/userfiles/file/86582549478.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/57295323465.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/mozakexoruz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989a23c3e93---83334614591.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/32489867629.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c7fbe7e4a---fezugowi.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/lkgtq218ssfpcmhb77p8g9pkf5/nowunej.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/61267124057.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/7de140b42c284c8dc6306d19cb10a771/17510297876.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/mifasogulami.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/8957a7f0d3bf35c6d5e959d78f47b330/jagobabavexalepapefudus.pdfIn PDF document text
    • https://deepex.hu/hirek/files/tegugiwufadopozote.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/2062007882.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/bp7uqbtogi0p0j2jqt1ib51fv1/87125520144.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA59 17344 bytes
SHA-256: 84f3f1c97ca7a77e538796e986ae159ecd1af75f2b487d86ccea1e04dfaeaefb
font_01_sfnt_off00010748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10748 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5F 10960 bytes
SHA-256: adcdc24936a7c5dea5151167f1b56cbd2967dfc34ab4a2670e0409d5a017d1ac

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