Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7dd749c96ee025…

MALICIOUS

PDF

89.2 KB Created: 2021-08-03 19:25:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b86a21d2805462c4c8b7b98925c7b495 SHA-1: 2482b5b1e7b1ad7a8c53a49e77ad81afc98e01f5 SHA-256: 9e7dd749c96ee025856a3ac0c59f0a1f931e32057d8a7017d8bb3c500705fb92
156 Risk Score

Malware Insights

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

The PDF contains a high density of links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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 http://renovator.cz/files/file/63538600914.pdf
    • https://cuisinescartier.ca/upload/editor/file/7254969951.pdf
    • http://riversedgefm.com/files/file/xibomuwif.pdf
    • http://rajskiewakacje.pl/userfiles/file/90294151442.pdf
    • http://casinodanmarkjackpot.dk/userfiles/file/27303920233.pdf
    • http://alexanderkanevskyartgallery.com/clientMedia/file/967856790.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/hthdvhfshdqk2292umdgfpbbn5/38248226371.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b45f2ba9093---turivomalekofogejuneremes.pdf
    • http://igabana.com/upfolder/e/files/20210725200250.pdf
    • http://focostrade.com/files/20210620215021.pdf
    • http://vejwun.cz/images/sukisiwoviwotupimuxugujub.pdf
    • http://dailymaydemtien.com/userfiles/files/11329822559.pdf
    • https://novahealthclinic.ca/userfiles/file/21652273699.pdf
    • http://dentali.cz/files/files/23756825457.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901b05dbcb6---dadasiti.pdf
    • http://jessie.vn/images/ckeditor/files/xoduvitubugometimo.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/5d3ef2be5eb428aa0401fcdb9fa359cf/jojuluwogabumejutaz.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/7995db9e5664c47496b1d700f5b294cf/96180535424.pdf
    • http://liga-stf.ru/i/upload/files/97666746381.pdf
    • https://ratsimae.eemedia/contents/file/gigamumapo.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/1c076249f22ef0609f4048d5c57b0d76/2821397409.pdf
    • https://keyseries.us/userfiles/file/ruzibeliz.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/923ef8912c1f9524cdf172ed37d31d05/88874879097.pdf
    • http://czdashan.cn/uploadfile/file/2021060812485173499.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/ogf05ssrffion7eu9ripdulke0/85756243745.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/4b51a302ad1860af987af76e674aa9ad/kebesudofijokiv.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=what+are+the+characteristics+of+media+and+information+literacy
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f76c.bin
5e112eca01b5564ff16774d82607a2757f5c7734fa8216e4fff33b396153b1e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF76C 10848 bytes
font_01_sfnt_off00011059.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11059 16792 bytes
font_02_sfnt_off0001286b.bin
aafd2aeafaa6b8070363017714081be0cd5e74f65b44805b102b53eafeded62c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1286B 17188 bytes