Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae986359ff2cbdf…

MALICIOUS

PDF

106.5 KB Created: 2021-08-12 19:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 10d7c2020000b57fd6a6042cb436e7e3 SHA-1: 77c77561ba8eee452044048b14b1beb757c2a03f SHA-256: 6ae986359ff2cbdf99996bc19ce03fdc7c415dca65d0b5b64b9d2c1cfe599029
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd8522f40e---ponuposexuparonawobuduzev.pdf In PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac456da6386---28648721065.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070df881bfea---33251058680.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/tumetufapuwipuwevi.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/warokaki.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/jewokatufuzexekikejiliva.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbbecf7fd4d---xaxufirakosi.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c582868a819---zanigavuxu.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/gilumetumizidizevenoman.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/57097844196.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/30768896407.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c379041901d---nukexiwevepazijuweni.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/55868522120.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/ee4054c04fcc17222399c9dd334479cd/71912810437.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/2t95cjnnhsn70lhtfk2a4cgdjl/29845561337.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733f4a1fe87---18526092737.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/vikexuredib.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a76f1d4b7f4---vajipe.pdfIn PDF document text
    • https://www.thic.net/plugin/ce1/ckfinder/userfiles/files/55955097387.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/5997178312.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/aed201bbfe637b42f297cb957e91a003/24910534942.pdfIn PDF document text
    • http://wellfoto.cz/pictures/files/97125481526.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=novelas+rom%C3%A1nticas+cortas+pdf+gratisPDF 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_off000139a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139A6 11188 bytes
SHA-256: 5a5ee85b07ea58256821e914b0a3e2ecfa9646f7578ecda94cb98af52870492f
font_01_sfnt_off0001533e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1533E 18156 bytes
SHA-256: e33c3e8ff297abc73a270003be61475d780efbdbacf0e0a7c1e0c6d6b3d5ed81
font_02_sfnt_off0001815f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1815F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1