Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f33830a6952652a…

MALICIOUS

PDF

84.5 KB Created: 2021-09-04 06:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ed136c55341f5d5f9929babe68e9165c SHA-1: 9480a25901ab56b72835fe0752ed70d3ba2a1cb4 SHA-256: 0f33830a6952652a815a58a89db7bae06f414efb5dffdf0bcf4deae36cc86d0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. The primary goal appears to be redirecting users to potentially harmful content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/e6ad280837e88c09b757cea22986eff7/wonigelagoxi.pdf In PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/gifixigegosavuwugalunijat.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/dj231iq5i90ecborpgbvekcvq1/70406341932.pdfIn PDF document text
    • https://martabaktelor.com/contents//files/47395033198.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/sekumikofafugulemonamupeg.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/b6dvft5qh555dvsgvmuamqjm32/xejitorivexibinutono.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/91909596226.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/b434d5d78e819ede20d6e8dab1970cc4/25161152925.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/51330594154.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161216d517f8ff---bemiluzikivodababavo.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/kgvgfg3p565bq819oj4ogpt9lv/52471302202.pdfIn PDF document text
    • https://starfoil-mail.nl/uploads/wysiwyg/81754265077.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/nosuwarinuzulonuz.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/76640187515.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/1884078766.pdfIn PDF document text
    • http://lakehighlandsrw.org/clients/863582/File/munebuwu.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/051d1a5b22625f833ef32042cfc6dc44/volabadidunonopabi.pdfIn PDF document text
    • https://blugarden.eu/file/xevajoguwi.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/13632151943.pdfIn PDF document text
    • http://zuche0551.com/upload/file/81577278712.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6ab36f2f9---xujovape.pdfIn PDF document text
    • http://staropolski.net/Upload/file/jekeziwadubesada.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/74717804722.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ced5cde5523---76196584427.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/e443b692c365a9524a5ae1c6da9ef482/51240854293.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/rakabubodewumufijilu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=self+enrichment+books+pdfPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/63832809179.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_off0000e4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD13 11028 bytes
SHA-256: 341cd274c8457abfb4b024ca61743ed59afbe318660d39d8e6a72e3c93144ada
font_02_sfnt_off0001163e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163E 17780 bytes
SHA-256: 27f0bc4314c2e058c41ea9695fdc545a4f4789f903f3d3dc005dd12454cc6b24