Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fdc7093461a6b83…

MALICIOUS

PDF

85.3 KB Created: 2021-08-13 23:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2e2ec2e72b1085dc55410c83ab1f82f1 SHA-1: bd0927c8f847fc9311676cb575374b3687e2757d SHA-256: 6fdc7093461a6b83068ada97293a96c73dd560a9998a9ecde4984a0a7fd00c26
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded JavaScript stream and a significant number of external URIs, many of which point to compromised CMS upload storage or are structured as link farms on disposable hosting. These elements suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://tkhomedeco.com/assets/uploads/ckedit/files/20210625003200.pdf
    • http://adabaskimerkezi.com/upload/file/nogomipifiwerisave.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/q0m6pietr5su9pb691c1ku53o2/xanewugu.pdf
    • http://banglatalkies.com/dynamic-images/cms/file/kerurexerajufol.pdf
    • http://ajisushionline.com/uploads/files/rowadufumuw.pdf
    • https://nanyangtextile.com/userfiles/file/75080696005.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/c016aee94c08f09f33df5d980cc47112/81073918467.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc9182f3030---pagajowiwo.pdf
    • http://metisentry.net/ckfinder/userfiles/files/daxizowisavi.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/bff7299c3e8f610bfc3ca4f7f5bcefca/sizopififalonajinuleveni.pdf
    • https://bankkartya.hu/js/ckfinder/userfiles/files/46182321941.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/5e6321f1b703055252f8e7d17dbd9be3/desemanuxepiwoki.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c28fbe91e84---sovamowovojudevimino.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/0frrcoqrd2vd3jg2ho01fgq70u/lutetijonivo.pdf
    • http://vksraja.in/fckeditor/upload/file/24450090390.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/mrq2vq8s8i7j5ifadt6u6hl11i/dovupotutasenigawe.pdf
    • https://prokoncept.hu/admin/blogfck/image/file/23638420065.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/e3bf734add45297399159d36f2802b69/rasenabajesi.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/9c4e22d2e8d5ddc808e7386f5f345e7f/54015041569.pdf
    • http://busanpc1.com/upload/fckeditor/file/18742447302.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b0353ea85---xunivalumakubusakerepilut.pdf
    • https://dodatnagarancija.com/userfiles/file/22812742814.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+get+coins+in+bigo+live
    • 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_off0000e83d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE83D 16792 bytes
font_01_sfnt_off00010054.bin
206e72c33c151a3b354179c6fb969d17136b67d33ee45c6f09a2712a23fcecd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10054 10424 bytes
font_02_sfnt_off0001181c.bin
de77e23485d2c2ee21d252c24fa305b14bb6ce498121c1ff2b605e60ece4eca8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1181C 17928 bytes