Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c46c82d627ca7f…

MALICIOUS

PDF

89.4 KB Created: 2021-08-25 17:35:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3975e0ec13b1fe456dd05b6b46e3488b SHA-1: f3218b9596cdf9b896abef5aa81bf53102c1edf8 SHA-256: 54c46c82d627ca7f912864c21d18ac9a2af73de92aec5f9abf1063702d80b765
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

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 https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/sjutak162g87nbvtc9gs1j7f4i/tuduvo.pdf In PDF document text
    • https://efnnma.org/files/file/22274103250.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/90059009042.pdfIn PDF document text
    • https://menu2uplus.com/images/file/vulisaxotovape.pdfIn PDF document text
    • http://bndweb.nl/upload/files/zikido.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/56794357656.pdfIn PDF document text
    • http://fondationmonetoile.org/clients/0/0e/0ecfe6182781ff486fe5156d2e85c11d/File/viwilosupepovur.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/32981787699.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5a6afe1e9f---duvaxum.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/uh48i7ci7aligk3vnht0spkrq4/lorajovekomajisivibojipu.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/d3f34bbcf6018ca04a2343197b889809/dipadufidowinas.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2064b648af---93097723785.pdfIn PDF document text
    • http://epilia.com/upload/FCKEditorfile/52187936065.pdfIn PDF document text
    • https://cape-electronics.com/media/file/supozugemotodilom.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/37585244497.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/rafuzokupoki.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089134b19e97---wibojebawubawemutakojavix.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/xatoveniwowosav.pdfIn PDF document text
    • http://ingfrimale.com/userfiles/files/58266992670.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/meladakef.pdfIn PDF document text
    • http://weforyou.it/userfiles/files/larinuwivojivitikolup.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/putujo.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90f7742c5e---jetiwipasana.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/d73703f5e77868789796aab59b675e96/lixizabuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+far+of+a+flight+is+it+to+hawaiiPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AC 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_01_sfnt_off0000f924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF924 17724 bytes
SHA-256: 1a0ed21404aa5539618e8f3fd05f347ef4dad452e08cd2297751aa6398658f06
font_02_sfnt_off000127d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D2 10336 bytes
SHA-256: 7503a822f65486e11bf7835f1f6db08f9a3ab77cd2ea6a7560a702434b63bd7b
font_03_sfnt_off00013f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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