Malicious PDF — malware analysis report

Static analysis result for SHA-256 63cc67a09f0843a2…

MALICIOUS

PDF

88.6 KB Created: 2021-07-22 05:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 39babd3a063e62fa1685c0ce697011ed SHA-1: 546f1bb1b22ce2426101b487bdea11d5a1e49a67 SHA-256: 63cc67a09f0843a29c6bee11401c055dced14a7b44f0e47b04175a67a24a3242
116 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or hosted on disposable domains. The ML classifier strongly indicates maliciousness, and the presence of a raw IP address in one of the URIs is a significant indicator of malicious intent. The document's structure suggests it's designed to redirect users to potentially harmful content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://rimsball.com/ckfinder/userfiles/files/sozujeludotob.pdf In PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/dff5728bdf25dfd332748cdd79f935b2/sanubuwawotawor.pdfIn PDF document text
    • https://eingangrad.ch/userfiles/files/63087356081.pdfIn PDF document text
    • https://petek.biz/resimler/files/baxoviligur.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef4a310f72---84825476388.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/gufipame.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16092109826149---37517992277.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/84413552587.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/rf5re97u4d0o9ja52u2js9a172/98480860850.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/36139680720.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cec5d69dfc---fupofijelif.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/xupeligajuximuj.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/ge62oua6kk9bnq13d0r9qvq3ml/27250598111.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/32148abb1f00b88d22607f26466f33b1/worobupoxaledere.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/d4cf6999bf0a6ae35861ebf1ee9199e5/8783702451.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a23917685f5---kujetivumejiz.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad28347821---65952130313.pdfPDF link annotation
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a98b9585b49---58297748351.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/62240996707.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/dofiwuxifurot.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc09ef7786f---15479681057.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/22145122301.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/e353013adb9ea230854cf643bd985607/43579289363.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c86959d6586---67202709903.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/e8e585e7a6ce47a9a0cd103d08c39b75/74954586464.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=human+proportions+for+artistsPDF 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_off0000f6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC0 17524 bytes
SHA-256: 8aa59ebfe1df4de5832c6a9dbb8049fe15ce5c8fd766aaf1d53cedb09243f4cf
font_02_sfnt_off00013c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C5C 10432 bytes
SHA-256: 4ba24648343545b649a96936e5c5f03c16a8379b9b555114292fc6ce27afbd2c

Open this report in the interactive analyzer, or submit your own file for analysis.