Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ce35ebfc5bbcaf…

MALICIOUS

PDF

83.2 KB Created: 2021-08-08 13:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d06f1eb7933a932bd25941c4931cc338 SHA-1: e109bdbd0fd9c006c01a7ca89a2f28856fd3c26d SHA-256: f7ce35ebfc5bbcaf3c511f35b8978a37fe18177c4b5d96d4f8294ad92cba0ee8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, forming a link farm. The primary purpose appears to be redirecting users to malicious content, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://laborke.ru/uplcv?utm_term=lage+raho+munna+bhai+movie+mp4 PDF link annotation
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6c3486b42---lufan.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/tukelavibujimep.pdfIn PDF document text
    • http://yuc-fac.com/uploadfiles/20210715120148.pdfIn PDF document text
    • https://pielinks.com/UserFiles/file/bufufagonuzirate.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/21852487861.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/773d2fddebba107284cd72735e36c7b7/22600497433.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/a0f28ed62f01e846b1f5fee2bb3838b0/98098540699.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/tisojedebas.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab70367717---bulilufo.pdfIn PDF document text
    • http://srsheicha.com/uploadfile/file/19571078197.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/zowerosipenaruxadomupa.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/xarilumugivijig.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/tinagavepokosaw.pdfIn PDF document text
    • https://nomortiga.com/contents//files/47399998808.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/91920680779.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/8a675f337f515dea0f3585fdfd3df9e5/wipuvazewibivakebo.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/79994072303.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/6916296873f0dd00cce7a20abc16dc77/16091128875.pdfIn PDF document text
    • http://esrafisek.com/images_upload/files/vomiketuterex.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/jldpu2lgdlkl0llh1kvm3miek6/97532634698.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/bikawedirifu.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/lonidasedobelo.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/ihmnfdln573n1u4a2bhgs34nc0/meloxeberupofeb.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/3mg1h37ftu9lg9a604p6v684qs/fiwonadanawuvasefofepef.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_off0000e149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE149 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95B 17544 bytes
SHA-256: 6b59568cee855801b4d96c1714412df6df49226f0c7315413f2496d781c72140
font_02_sfnt_off00012765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12765 10728 bytes
SHA-256: 49fbc454eb60f8d3b97494a985474815c3d9d7783b4ff9f8eb724ecb8a81e82b

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