Malicious PDF — malware analysis report

Static analysis result for SHA-256 7849aa3400556333…

MALICIOUS

PDF

82.6 KB Created: 2021-09-06 02:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 1a30c18b9da51ca5c171ce8b02add790 SHA-1: af7e5258a7b2d4a78a4ecc6bd93272e772cf1255 SHA-256: 7849aa34005563333fd2aaef6752e3b8bc18cee4b5ae41f1bacfe5d5d08b8eeb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a pattern of using these sites to host or redirect to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://smidgel.ru/uplcv?utm_term=comtrend+nexuslink+3120+manual PDF link annotation
    • https://tonitomov.com/picture/file/82725319425.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/vufomaleda.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/43b77d4992fb212f5a2d5f5d7d7e4015/65492506645.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/tawimasejuxajapakeriguw.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/4b7ledphbco4tn2mqvsl5n61g6/74889274658.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a3413f4fe---dixetin.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610367472b189---40848392011.pdfIn PDF document text
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/37943049506.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea9dbdaba2---mirukare.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-8-3/20210803015706300119.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/26082613670.pdfIn PDF document text
    • https://tunhuaduytan.com/upload/userfiles/files/24153883675.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/jt82vt9e9ioqgsebbcd20845v5/wumagubazeruwipalodudavum.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944f280e294---fasewunodadipumadupexiwal.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/vupawafezemekanuvef.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d64f63fbd0---70254486391.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/tenexelonukisol.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/62103080631.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16099d7d59896a---94394020814.pdfIn PDF document text
    • https://5uempat.com/contents//files/76806011020.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/10454342139.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/motavipazafaruvogad.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/64253968192.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/a01363c8d55acb41f925e09ae0a6530f/bisikadisidogemis.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_off0000db77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB77 17932 bytes
SHA-256: d1875189b7680b2cdeab1a2e6cf4f70f96d93d83030da9214fb7d349499c5d28
font_01_sfnt_off00010a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A38 11200 bytes
SHA-256: e6cd44c2861650165926077bfcb439aceaa4c1d804898632d31653644b44364f
font_02_sfnt_off0001248f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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