Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0653109d5b4359…

MALICIOUS

PDF

88.1 KB Created: 2021-06-28 21:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f104961d7e44f54a3da360c38dad0e35 SHA-1: fc5a088d060e118f82fafa1ff911b6494ac8068f SHA-256: 8f0653109d5b435950da142c2835aa907d61d64ee1ef6b66ea18418cab5c2c0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous external URIs and link farms pointing to compromised WordPress sites and disposable hosting, suggesting it is designed to redirect users to phishing or malware-hosting pages. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://drafthe.ru/uplcv?utm_term=love+languages+gary+chapman+test PDF link annotation
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/4e42f02a3879a717d8d4952bb418485e/13531140702.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/164id21aop4u3a16htibcgks7u/22627416398.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/3ca4b95fa3ad62002f18386021ae5058/rajotawidisot.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/71764739957.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/25957125948.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/934f4f262c3fcfa1cb736eff44be2056/sobopelovomunipadafode.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/a56f1420c9f633a039e3d89271e0fb6e/vutuwibobapulo.pdfIn PDF document text
    • http://poorclarescork.ie/images/85168741756.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c922ebe5b8a---jaredoxegosilixar.pdfIn PDF document text
    • https://dineflon.com//files/45503842613.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/99011a1755a0f332e4568c7b2d3371b5/woxonujazawopaloji.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0234620f0---xopesalowirisaful.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/dad6a0d06dbc04d8f2da8a2708bf4c15/jiveseke.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/dddb48679aa0990d05423942fd79960a/fimilura.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/17772247985.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/8oifmgikvp2dovu0m3v6rc0ov7/fopivadomekeduxiwalegew.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/eea25f248345a561194df9971866dd95/gobaxavulisuzofep.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/venano.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/pakufosurepuxugofeb.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/e073681695db3dba600ecd247122bb9e/gumoxip.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8353c5d74---lovagoja.pdfIn PDF document text
    • http://woorymart.com/userData/board/file/79061759950.pdfIn PDF document text
    • https://dm288.com/slicice/file/64388985383.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16071b8086aea6---rewemokuxanewo.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_off0000f2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B2 17872 bytes
SHA-256: f1682a3aea22f0edfedeb6898dddbd3de8e078abef6c454012fe2f481d0faf10
font_01_sfnt_off00012187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12187 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001399e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1399E 10964 bytes
SHA-256: 7bd955c7a419c9c29ee715ac37d2c67d91e29439b66adc36de03360033007324

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