Malicious PDF — malware analysis report

Static analysis result for SHA-256 89282ad9e5e42a18…

MALICIOUS

PDF

93.2 KB Created: 2021-07-02 05:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 7631bac1f80f4b26ce94ecb7574ae58a SHA-1: fff9108deff999f8dfb19e7a2cf6daf557561966 SHA-256: 89282ad9e5e42a18077d5a211483cf722a536f51c42c532a66c5de03e09b5788
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with phishing or malware distribution tactics, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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 http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160829270d5eee---76901281075.pdf In PDF document text
    • http://cestovni-postylka.eu/userfiles/file/zamudupiragafowos.pdfIn PDF document text
    • http://atomleasing.ru/media/File/witilemakaxibez.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/u6r189qt7v8vqs6uaob7urns8d/49264307963.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160adaee68778d---68861943917.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/vhetg0kkdtm6ltqvhmcg3c5knn/vofisakapotuk.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/74b72045b153d9c679ea572d567ab23f/12980718178.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/0841fcc2cbeb856cc53e2b3c9e6aef2d/57916199585.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/187fa147a26fbf6399c436d800f2b179/somobasiwato.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/sogibupepaxivogu.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/76354590079.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b15121d604d---21862731219.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///3696519225.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/xijimofo.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3bcc585b7---vimituxokirekejatun.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/29027374813.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/kiwaxerugog.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbbd6a0e4f---3930099181.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085b4f3d12b0---fitototu.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdb8fa18ee---30184039888.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/lavuwumakuravobinev.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/fb4f2f32f056ca110f3b43bf6d643525/ritowapenixowuruvebiralox.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/darigilemadezeka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=best+red+wine+for+lamb+shanksPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF127 18112 bytes
SHA-256: 62e711532a38323951db7df1475c24f2b2039f0e9cd42baf47b8393965aeab4b
font_01_sfnt_off000120a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000138bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BC 10988 bytes
SHA-256: 9b9c09a628307b6828c81efc15ebb87ed284f4619265f965631d6fe8e0129072
font_03_sfnt_off00015221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15221 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd

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