Malicious PDF — malware analysis report

Static analysis result for SHA-256 4195ce719008bf58…

MALICIOUS

PDF

86.7 KB Created: 2021-06-26 22:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ed300d8caa05e116a8f674dd35ee0bf0 SHA-1: a207dd6685c20e25a15b63ab0e577c553aceeca2 SHA-256: 4195ce719008bf58de03f17a7bc537ffe6000e459f502e16596e99bb0c377e71
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://ajwatravel.com/wheelmarine/userfiles/file/19918514098.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/ed74240dbf1fb5817645230be5a17dbf/41436916962.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160b91b69ce9e9---najaxudodemofor.pdf
    • https://soudurelausiere.ca/upload/editor/file/watono.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16073af075d9e6---52502724209.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ntu96uhan2f8pr6101rdrd7j92/19708088484.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/zixopapopebujunabajug.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3ba1bb618---98017300805.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/73302730743.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/e18902f2a5790e610790f54f5667aa89/datutonan.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/08378fdecd1a812bd3116a9d44fe78d0/mogemuraz.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/9d0fae884ef5d7aeeee629654b3b92d0/gowojonojifutumefigi.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb3fa330fc---31731449244.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b94d08a8f64---xijiwuzegisotoponupeb.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861e399d36e---kuwivekewinekukabopubux.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16084e57a1504d---mexolefila.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/7132fp005t5mhut13uvcglk4e3/mifafivegosexumoja.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5961e41e3c---22693475265.pdf
    • http://sungsam.net/userData/board/file/11298083242.pdf
    • https://belhasasecurity.com/userfiles/file/jeguri.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf24418265---sejemezusenefesixunevu.pdf
    • http://hevolta.com/upload/file/lofonepusam.pdf
    • http://modnyi-buket.ru/uploads/files/99106967739.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=what+is+thinking+in+philosophy
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee1b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1B 16792 bytes
font_01_sfnt_off0001062d.bin
4346db0512ca5f41a11a37769798bdb6f25f9bccb7ef63006a76a7c2f71af58e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1062D 17720 bytes
font_02_sfnt_off0001344c.bin
51b7ee710a4f204a6404dfea5d63e75c5a4db74fcf6ec4a94071704003ee85ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x1344C 10496 bytes