Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a4560447e1de8f…

MALICIOUS

PDF

100.7 KB Created: 2021-08-05 00:35:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 1de5ed7ed180300722dbd5ebb0672b04 SHA-1: 860581d3fa95f3ec1ea43b1e95bd423346c11515 SHA-256: e8a4560447e1de8f5c63bf27af0ccec93d1da14516b2c24acb9c99f1ab126beb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=the+secret+life+of+walter+mitty+trailer+subtitulado PDF link annotation
    • https://projetounificado.com/uploads/files/pavulawowuvijapenu.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/gidobuvowupezukokawaros.pdfIn PDF document text
    • https://toliveinchristjesus.ceosale.catholic.edu.au/application/third_party/ckfinder/userfiles/files/mupivivu.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/jopubikexejubomobewure.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/cc0tgd2iidia31b29repsbrv93/22253254139.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/dikusug.pdfIn PDF document text
    • https://maintogelonline.info/contents//files/pemiv.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/4juam7rd7rjeiahgv6oq60i6c7/sofukenusetexibiviraw.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/tafatuvakefimogotobugav.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f65612c01c9---56264229937.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb2faeec88---46576678435.pdfIn PDF document text
    • http://abc-tel.ru/data/File/jalisirafalojukagiboxu.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16083b92389623---sidegibunaxijizij.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607871600d16e---kumodajerumiramegovuda.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/fusitipiteponato.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1386d890e0---pasezazadimisufema.pdfIn PDF document text
    • http://sciattella.net/images/file/4466978093.pdfIn PDF document text
    • http://novichiha.ru/pic/file/sojukaxonisutofug.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5dacf7f62f---bojojiranijo.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/sefekijatawigoluturadif.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5662021b9---jokuxubutejojuz.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/bitapubi.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/44354469072.pdfIn PDF document text
    • http://vestmorecapital.com/images/epost/zidufumugusomonizal.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/wuzobunukifujeg.pdfIn PDF document text
    • 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_off00012329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12329 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B40 11040 bytes
SHA-256: 22f22a53dfcfddb78511c722ab2f34f7fae97f88ddc8c14cff6575f9d73198ca
font_02_sfnt_off00015505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15505 17836 bytes
SHA-256: edd9000fcf95c865342e9b07608e8f00fbf422c51ace195ee7ffed50a4f81be2

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