Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d13b1d5468ddfd…

MALICIOUS

PDF

149.6 KB Created: 2021-08-23 12:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fa8a5fdd01330f74340e91e67007bafe SHA-1: 58e840d8acfeb0b83ad215f045a2693133321615 SHA-256: d1d13b1d5468ddfde0ec52bf880261ecc01cd222cd4acace5451b5675b4b1965
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to websites that appear to be compromised CMS uploads, as indicated by the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the link farm structure is a common tactic for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://eslms.com/userfiles/file/36762435810.pdf In PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5847e0990---75143731123.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/c319a86483ea27a2ef4dec9f613aa79c/bivanibaditalavivamiz.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/92598035890.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/4d56e3ef2446b8208dcbc695b36709d7/75906866819.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b543f5a3c94---posobigileb.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/mopotezememovabilomumam.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/84361194809.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210516151610_rt9kfd.pdfIn PDF document text
    • http://seamacros.com/upload/file/26827713481.pdfIn PDF document text
    • http://bclgrouptt.com/userfiles/file/ludogupomakerotonagus.pdfIn PDF document text
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/xeribamusowav.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/06/19/file/20210619_223750_115.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/09q1b9a6sour7cov9l4dtsudfb/gorewu.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/nodezikalogewujogaman.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/riloguxo.pdfIn PDF document text
    • http://paglialonga.it/userfiles/files/xukurosanalusaviwofuwit.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a04f589b873---nosivukoradatibusarifagif.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///17335509230.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/39375714286.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/66471628256.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071991adbefd---pixagepifi.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/87685310644.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/nakojisenewi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=five+nights+at+freddy%27s+fetchPDF 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_off0001e9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E9D2 10780 bytes
SHA-256: b53de5859e68919a5a5ed962ef0205587bd3f11d1e1d33714e478a9d009edc0e
font_01_sfnt_off00020271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20271 17300 bytes
SHA-256: 540f1b68feff50bd419f1b178841f67b30e3b7f6e1c5afbc9df467185cc5de43
font_02_sfnt_off00022ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22FF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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