Malicious PDF — malware analysis report

Static analysis result for SHA-256 190ae083ced7a30d…

MALICIOUS

PDF

93.6 KB Created: 2021-07-15 11:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ba9f73dc17163ba95a30c5bcd434f2c6 SHA-1: b99f5c8421e903bd99fe631889abb4b4195e1e06 SHA-256: 190ae083ced7a30df6d9c3e79bd6de816baf960fad1b997820f43444788ba4ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/dd58cd6efc2f7a47903dc3d36d91afaf/3173291985.pdf In PDF document text
    • http://maility.pl/_ADRESuserfiles/file/mufozunejepufu.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/49004181948.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/77828659856.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/bilega.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccae7ea95d---posewulepakodizet.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba694dedb40---2013576460.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/52967119834.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d171f0dcb2---89671897964.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/0d0a2add9de55be9a0ceb9d4ed7ae1f8/goxudasebexibikolojofu.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/riselagowisepikukubekig.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/80620706630fe7ef56092bcdbc24d553/78560830104.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/80970992724.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/61e5e3c9849769c1542d0a09e47369e8/89680675838.pdfIn PDF document text
    • http://rozgarnetwork.com/ckfinder/userfiles/files/75229626086.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/78775299576.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/c5e7b3efb018e718a4f9c3d4d7043f38/8639459901.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/657ba2b8334ed82fe7fd83e4dfd1c612/bofivarenelotawisafax.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17dc18461b---35477598741.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/d3ed4daa3e63eeae90b8cd21394415d0/sopatukusuvibovukij.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160856d01e97fe---21933036625.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7212a6d2b9---bokimujositolonizoresevim.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b194b3e95---vodorozolivo.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/18f8bfc63cc012c62d700812f225e515/30206781140.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=myotonic+dystrophy+physical+therapyPDF 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_off00010bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD2 10716 bytes
SHA-256: 418c8117a07a895ac4cf60903bd54cbc4f20cc5b4ac5a1f0a5927a18a1e78a12
font_01_sfnt_off00012463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12463 17172 bytes
SHA-256: 62de8b33a448f3d58f75b9b164dfa665115a97a9fed4d4a05d325bae0cd54e56
font_02_sfnt_off000150d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1