Malicious PDF — malware analysis report

Static analysis result for SHA-256 3065eac95ee84eae…

MALICIOUS

PDF

71.8 KB Created: 2021-09-08 21:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bf04089f36628b97e7cdc5eead638b72 SHA-1: 5de8085b027d2df44ca7a255e2384d7575abc24c SHA-256: 3065eac95ee84eae43a93327dfc483e7a13931bd273a36068d7e3c25e4a6c57f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. The heuristic firings indicate this PDF is a link farm designed to redirect users to potentially malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://huntic.ru/uplcv?utm_term=evinrude+etec+115+owner%27s+manual PDF link annotation
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342f20652a4---gomotelil.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///gawunuzux.pdfIn PDF document text
    • https://exam11.menapoint.com/app/webroot/upload/files/57847189258.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a6d604afe---botajumadibon.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/13b742fe23cb0e815bf5daf2efd2c6ad/dokubamokuxasoruvazuruv.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/nufufijos.pdfIn PDF document text
    • http://akiisushi.com/uploads/files/3271838863.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/925eed59adf9271fb5004ca2853b3189/jugewamonob.pdfIn PDF document text
    • http://synergytaekwondo.com/click2buy_newp/userfiles/file/kapatizilufuxuraxapaxom.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/sukupomisuletotadipelaji.pdfIn PDF document text
    • http://sentralperdana.com/file/wijazimika.pdfIn PDF document text
    • http://limoride.net/gallery/file/80591419990.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/92508912575.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/bidifapavino.pdfIn PDF document text
    • http://www.chubsorn.com/file/files/488488808.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/getadomapanipamepur.pdfIn PDF document text
    • https://madeinstlucia.com/userfiles/files/55105566074.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/53577031123.pdfIn PDF document text
    • http://marasintl.com/public/ckfinderuploads/files/xafalomawamefovosa.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ba9c1a889---piralurekani.pdfIn PDF document text
    • http://tpfish.com.taipei/archive/upload/files/76612487739.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/7734060916.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/161345aad16f7d---nufabosazagoxakinejat.pdfIn PDF document text
    • http://sinojjacob.com/userfiles/file/metazudo.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/vofumeroxuwisigabujuza.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_off0000b8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D1 10984 bytes
SHA-256: 4d626c0878afe88d2aebb62ca0821144cd6e4e043a8530a38e23d408564dd085
font_02_sfnt_off0000ea6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6C 15480 bytes
SHA-256: ad32e00589e2843af223fe5959b5216dcd286dab44a98b85cdeb8f67da166fbe