Malicious PDF — malware analysis report

Static analysis result for SHA-256 63af36d33b361648…

MALICIOUS

PDF

129.7 KB Created: 2021-06-11 05:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f80e3cff2b4271fde1cdced8953a1b4f SHA-1: 29b2ef26709a286a55911ab5884b910bfd9c132e SHA-256: 63af36d33b361648279e1e1e307be5dec66f0cf459adeca79470deefd44672a9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links, many hosted on compromised WordPress sites, that likely serve as lures for downloading unwanted applications, such as the 'fnaf 2 full game apk' mentioned in the document body. The presence of multiple external URIs and a link farm structure suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=fnaf+2+full+game+apk PDF link annotation
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/aceedaffa23cc91de7630ba4798e8ce4/sopumisu.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/ed7e1bf5db5c9aa92a1dc8f8b519615f/51355782982.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/7829030be480b93889c7559c98b4862c/36878830945.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/lazabomov.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/70ioc8k0736t68bsb8eks4ej0c/81849634979.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/jikeaptevpckmrej6isfbgjg0g/71605877493.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/723058d9ab6706b633200aaee69ef281/43139040118.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160902bfc3fed7---20367455895.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/o3qu2gsepla71gd1t6jfc5v5jj/wuzorerena.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ad96a31a5---wesosijanu.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/988351dq7fo1241gldvp3nh8ma/43327257515.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6054c653d---vagalakogewodokotofitoj.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a30020b8c---zakoxis.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/xeregivutafirureb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000176c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176C9 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off000186bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186BD 5100 bytes
SHA-256: f04d8350feb0df323003d5bbd6916fd35ad23755f7b922ef7ae0c9d8fcf48f1b
font_02_sfnt_off0001980f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1980F 4608 bytes
SHA-256: 22e9032645799a6ae5d6fe37fe7d7fda62c81bd530f8ec8ac04ba5a12100b524
font_03_sfnt_off0001a92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A92F 17600 bytes
SHA-256: d9103e8e7adf07551f9f5c5740cecef76feea00d8f1a29d1be498c805b17f0af
font_04_sfnt_off0001e034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E034 16632 bytes
SHA-256: 9b6f0ef442f45a46b15d41bbe49d2e05e57c11652829a077100cee0e6608dbe3

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