Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6b19ebc8e0a252…

MALICIOUS

PDF

84.2 KB Created: 2021-09-03 04:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 89df447c202f2093307a45c584d5b7ee SHA-1: b1b9dca0f368ffc66330344d9549c1cd6c7a733d SHA-256: 1b6b19ebc8e0a252d87069304c82156eca1e7735406700411bb4ec46f30366c8
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs that point to various websites, many of which appear to be compromised CMS installations used for hosting malicious files. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, likely to trick users into visiting malicious sites for phishing or malware downloads. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://allytemp.ru/uplcv?utm_term=passive+voice+pdf PDF link annotation
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160debbfc24547---46033682584.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/63796ddfba86b9d95ecb1c2ce2d270b9/ruseruziw.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/nekewasim.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add2e4a5bbe---8085713226.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/metiwunivamisudupapetes.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/6bjosii7epdf3if823q79nrvs9/kewutiwiruwakifub.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d07f6a3611---nokigoluxodulewa.pdfIn PDF document text
    • http://liddellgaryfamily.com/clients/863293/File/89429753915.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/26417d26370cbc4d0079dd98d6e982fc/pavanaberedosone.pdfIn PDF document text
    • http://iccarrentals.com/files/file/vakuwasim.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/liwoxeja.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/0b660de62c240e2848731b9ed0e92e00/pelonopunifexenuki.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/82044654540.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7513b6d5f3---xatimixurazesujo.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/ritekogapijajajuz.pdfIn PDF document text
    • https://patriciobanados.cl/upload/file/In PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/c8db45bfacb7dc264da32952487ded83/jujutananofujafilapefo.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fa35f210c---pogigovakaxufipelobumemo.pdfIn PDF document text
    • http://finchamauto.com/pics/36677710684.pdfIn PDF document text
    • https://hsse.cl/files/gapij.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9d97a11bc---56585181219.pdfIn PDF document text
    • http://web68s.com/upload/files/24567346056.pdfIn PDF document text
    • http://cisseo.net/userfiles/files/54380183183.pdfIn PDF document text
    • http://kingsfci.com/userfiles/file/nugokelurumevaje.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/riguzedebudini.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_off0000e423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE423 17960 bytes
SHA-256: efdf069d5f11d0a7b13af3ad2427c888bd5e31abae7d5f6116690110ec1f4f56
font_01_sfnt_off0001129b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB2 10332 bytes
SHA-256: a8f8a359b5303ca4005661d490dcb4354607e9a1ef5db03b54975b179ef569a7

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