Malicious PDF — malware analysis report

Static analysis result for SHA-256 0397bdf3e22ba970…

MALICIOUS

PDF

78.7 KB Created: 2021-06-25 19:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 486c8297193cc90c4be0630df5837426 SHA-1: 758e3fa0e30bf3c8209679dd2b94eb2ad7bbeccc SHA-256: 0397bdf3e22ba970fd78c562b229f027d1f2af47ff1d1c1f923f35783b11f438
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to multiple external URLs, many of which appear to be hosted on compromised CMS platforms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to trick users into downloading a secondary payload. No scripts were extracted, but the overall structure suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/d3d21cf627c8d90af2dd8e0848b4e4f5/2715326137.pdf
    • http://esoftland.com/userfiles/file/68135350759.pdf
    • http://tfh-filter.hu/_user/file/23705786389.pdf
    • https://eobliecky.sk/userfiles/file/kekesoberavozanorejob.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2c3952230---lafixufezore.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbdccd7a97---vaditijoginurimezelerav.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5fd64bf8a---mebajowaxewoxi.pdf
    • http://chipublichouse.com/ckfinder/userfiles/files/zokuzuzosen.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec46625783---mejejususetem.pdf
    • http://jtour.vn/userfiles/file/roxosifa.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608147e780e09---sixunabukided.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/v8c1na79fq8rojq8lmik51gcti/18666536402.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff03742c55---nupalipusedopetug.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/c221a461a0c8875710966c29b0fcf76d/ziwuwipuz.pdf
    • http://bestbuyfromindia.com/userfiles/file/63454041083.pdf
    • http://altinay-law.com/images/file/40078408055.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071773ca66fa---zoxerilivoralovolitogonad.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790fe3dc640---xesivu.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4b87c279d---sojunuzutivezot.pdf
    • https://hansenlight.com/UploadFile/files/nimuxuvabujavixupu.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/ka20nkvbifa6l8hf14ir7en2c0/bubegevamujozilalivulo.pdf
    • http://aucoindeshalles.fr/menu/file/gonaxamuxe.pdf
    • https://cubic.is/userfiles/file/rejepukos.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/e93565dc48c4041566fd47db8656f7cd/84031641370.pdf
    • http://dzbnf.com/upload/file///54639723820.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/tomqsl0rp1o8bptor1ti65el7f/bexofekotolokebeforegibod.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=angles+and+arcs+worksheet
    • 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_off0000d47f.bin
0a6ccde9f617f0105a42a4245b7a607bb2a2714b0462818fc95a4ac9215e4ca3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD47F 15812 bytes
font_01_sfnt_off0000fd0e.bin
d59bc395b562ff6ec1ebdef42818148e388c5f7b166fa881d70773ba51152a94
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0E 10716 bytes
font_02_sfnt_off00011596.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11596 16792 bytes