Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aba1c2fbd29becb…

MALICIOUS

PDF

94.5 KB Created: 2021-09-05 06:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 197d3987ea9d877141ad89c81a490c25 SHA-1: 8f366cbd34fd4a3489754be78f33b5fce10928be SHA-256: 4aba1c2fbd29becb4155ee2f01da65c3b2165c56c520a35d5352ae711d0588fc
96 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier strongly indicates maliciousness, and the presence of multiple PDF link farm heuristics further supports this. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 5

  • 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://clubmaniacr.com/campannas/file/85046153017.pdf In PDF document text
    • http://tsmsaldature.it/userfiles/files/32950316876.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609335d67fb61---65573114084.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/0nlpnb9hmerjtlbdsurejrlno8/17171799783.pdfIn PDF document text
    • http://czapla-dachy.pl/public/images/fck/file/subopuxikapopu.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/13335040191.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/29447494024.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/f5e56212fde844bdae22e843df5ae5cf/54780027182.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608727334e4f8---vinizanefi.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/rojejobolaju.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fe14a5b4a---52669234668.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/lizevonasez.pdfIn PDF document text
    • http://laboratorioshamalab.com/userfiles/file/kuxexojepazebuzesib.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/t3n0s631d0198rf56mlq24hbfm/nazirawalereliwik.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f25cc05804---dovorulameruxeg.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609471b9a7aa8---15479627300.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/rabilupaxaz.pdfIn PDF document text
    • http://mamolenasnc.it/userfiles/files/pijoxubukafagexatuvip.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/9b6e43fc3ee4e5fca893c742aecfb6b4/busifupelonudu.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/logulenidefeduvovenupet.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/pimefif.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/fesiwutuxewokuvokaxaxibo.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/02rads7878m3ek3a9dug3ul3d0/5683544343.pdfIn PDF document text
    • https://haciendaloscipreses.cl/upload/file/55852604652.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=apologistas+cristianos+pdfPDF 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_off00010a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A27 19500 bytes
SHA-256: e856040b2468ea11d05500e8ff5a31aa951cc3da9cd3985c611ca2d9d798b8d9
font_01_sfnt_off00013c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15467 10644 bytes
SHA-256: 00b707e2afda63997e60de41ce6a3e6f02211943399d2128090940fddea98e03

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