Malicious PDF — malware analysis report

Static analysis result for SHA-256 525005b424313bb5…

MALICIOUS

PDF

88.9 KB Created: 2021-07-03 06:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6924d10248558cdfdd17d3cb49c96ca3 SHA-1: 9d75233e825148cc1598d54551d8fe96e08fa2f8 SHA-256: 525005b424313bb5a15c1803d050e1873656c84cfd22dc8a856a975139db0ae7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://nomylo.ru/uplcv?utm_term=average+height+of+7+month+old+baby+boy PDF link annotation
    • https://ctners.com/ckfinder/userfiles/files/diwexebokasovunagozegixu.pdfIn PDF document text
    • http://ekotronic.eu/files/file/65618273439.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6bd5dab18---sidawiwenedozategaximeb.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083ab59aee41---nexulinugomofifuwirudole.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/watolukonulikabeliz.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/dovojofiwuvozowa.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/bb947cbe769156a0f3c3676a395869a9/37343630509.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a119f8d5230---saxelenosaruga.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/4a5ea38c89ed19ec7f30a8b72ad26327/68875137490.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/cea4b4c2f1f6bd97c4a689dbb13e938d/94248387806.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/88474189762.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/7f770f2be36c5ee7b66b11cbf14660b4/98104098058.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/bokusimisune.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/3ilm7ar9h6cb0ht0j1h567r6b0eu3d5r/86791738461.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/66464095882.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/5581af4f37097dc03b881001f9a55171/sapubakawumaxepolerovosu.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/veronivurudofojunejivuf.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/41905965143.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/4569cc39e2ea2c590113d062711b353f/nikokaperosofobo.pdfIn PDF document text
    • http://iphysiology.ru/upload/lexowepewu.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/kasotopiku.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b342d90c540---rigimutanefuwelurejub.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/tolanedofovosufosu.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/6bfb457c0423a3764ba5e1a002f833d5/79246862057.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/54773345763.pdfIn PDF document text
    • http://paulsaperstein.com/userfiles/files/jojafufovubide.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_off0000f772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF772 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F89 10984 bytes
SHA-256: 5a24c2da3cc7b6066bb6e58349f146fbd3f5d1c304c8fde8993dbc6e6c972264
font_02_sfnt_off000128b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B5 16912 bytes
SHA-256: 6e4e4f4a43de9eeddc872e4f84aef515c0f7f33ff4165084c7a9d8a934e6d56d

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