Malicious PDF — malware analysis report

Static analysis result for SHA-256 5966a7c6a2778334…

MALICIOUS

PDF

118.8 KB Created: 2021-07-13 06:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 2302daa7771f2b7cf2e2703d720a350d SHA-1: cff91f01807a8f9afa5be87f77d7c6f61d311c0f SHA-256: 5966a7c6a2778334dca0361055c531887e8767d67690da21448b5b743eba9478
156 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malware distribution lure, as indicated by multiple heuristics flagging it as a link farm pointing to compromised WordPress sites and disposable hosting. The presence of external URIs and embedded URLs suggests an attempt to redirect the user to malicious content. While no scripts were directly extracted, the overall structure and URL patterns strongly indicate a malicious intent to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9691

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://drafthe.ru/uplcv?utm_term=how+to+get+modded+weapons+in+dying+light PDF link annotation
    • http://yameitecl.com/ckfinder/userfiles/files/20210709_162311.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/30516625387.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/9b35f35c166cf4bbd817eadc3a644ab5/29325302822.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/l4ei3fcvjp9q1e89lcatp3uq3q/sejomonuvigabivutagineju.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d411dbd43d4---jikogeviju.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac0916fd58---retebeduvupewebadanozi.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/o9et8emjka4ieoa67efprdf5jp/80493135908.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/700ecbe4714d4a6854410357c5b55461/lozekifajobifatukolaneg.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/t5ahfmg3geb6ni9cd8dtkrudbk/16049059243.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/4023553401.pdfIn PDF document text
    • http://angeladaniel.eu/uploads/files/58552298499.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/fddd49fb5b21cc2b3b2c830574801ef9/75812219302.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/xovimezotuferesebozijexu.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/13202804371.pdfIn PDF document text
    • http://coalcreekcentenary.com/clients/5/52/52f735e63eff8706e1a2a73a20aef632/File/zazoxegadolukapuvadu.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/vubetijamopuj.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccfddf975f9---favusapemetivejiwefe.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160722ad013903---pipur.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/0c87fc70041f86ad780b3a590c1075eb/23609779492.pdfIn PDF document text
    • http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/89444893960.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb1116e44d---7534967662.pdfIn PDF document text
    • http://emurus.jp/userfiles/file/93169527265.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a82b1d1796---75097425251.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001439e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1439E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BB0 18948 bytes
SHA-256: 5a7a02a8c0284a2b6b989c96974cb93434a2bda99418731f9415a70ef232f358
font_02_sfnt_off00018e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E3F 17348 bytes
SHA-256: 1361420a7e6106104ca3bd0056db5cc47cb708e74f47923fd846f6d7f9cb0a46
font_03_sfnt_off0001a858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A858 2140 bytes
SHA-256: 7203e1b3160a2d0054459bc8224160450adad9c7414a1ca24de448467c3a1ae0
font_04_sfnt_off0001b1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1DE 10932 bytes
SHA-256: 07d406344a066a5164b1e5f5819457ada3f40e2f320b10ec3885d8e466226664

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