Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba89763221fb930…

MALICIOUS

PDF

101.1 KB Created: 2021-09-02 23:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 2565327d47d748aee1c87cb927c51568 SHA-1: f49c54782bed4ba92aec1a4b7e5983c758cbcde8 SHA-256: 6ba89763221fb9301e486a8f9bcf69a71bbbe5bd12028a888524a55d55837a9e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious sites or download further payloads. Several heuristics indicate the document is part of a link farm designed to obscure malicious destinations, with some links pointing to compromised WordPress upload storage. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pieseautocomenzi.ro/userfiles/file/manudeduvil.pdf In PDF document text
    • https://rmp-familienanzeigen.de/cms/files/25076614284.pdfIn PDF document text
    • http://dakmet.pl/upload/54190751275.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/e3ac53407380b6be5bb3fadd59f6496d/tukugejixi.pdfIn PDF document text
    • https://pasarangroup1.com/contents//files/zulusanoxilobawod.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/fisazewuzijolovisumedir.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/34225239407.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/fejezujani.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/l1etk44k6tee3boirk0lj2du97/kadulotene.pdfIn PDF document text
    • https://aromamarketing.md/img/files/25802270398.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/7d622c3f9228605a17eb65bcd2b9a768/punisatik.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gebuxijarafotidarosu.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/26898257596.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/05a13f81b160f39b4e86f2eb37141f8e/diramolejesozowewevem.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/6323eea4da8cdebc18f184e2941b952e/nixenobi.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/7be6bc09089b118a36387c7b5e8f4c17/dosiranetosejepotuf.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/kupopod.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/gugebofekenememadolasowop.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/dunilamesokugasokovebe.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b561fec4e4---41531568756.pdfIn PDF document text
    • http://rotang.net/userfiles/file/lusedufulijef.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/85651019224.pdfIn PDF document text
    • https://pendekaremas.com/contents//files/fujekuzavojiwarapiliri.pdfIn PDF document text
    • http://1000projects.ru/upload_picture/file/waveteg.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/nuvon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=minitab+18+training+manual+freePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12383 10760 bytes
SHA-256: 1c4bbf4fe8fe6fbc80c81f663868adc06f9a77e9d8584a51642d1041c588189a
font_01_sfnt_off00013c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C4E 19416 bytes
SHA-256: cf53d26d0386bc9d8a2c0eb16904d5e8f058bb67885f8d390572181d88c6d86a
font_02_sfnt_off00016f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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