Malicious PDF — malware analysis report

Static analysis result for SHA-256 038698203b4d9777…

MALICIOUS

PDF

76.5 KB Created: 2021-07-25 09:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29c2effae71138d290f4ecff5895ae7b SHA-1: 2cbf22c21132f0d2ec59b429ede406534664609b SHA-256: 038698203b4d977734e37d37b4b9d03b2fa97a334800a613ce69dad50b4a4668
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://eszixv.hu/ckfinder/userfiles/files/xanulave.pdf
    • http://doubles301.jp/files/ckeditor/files/besasunav.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b634c0a9e46---waduzefomefijisetariniru.pdf
    • https://cafepiolho.com/uploads/assets/mezofexadalowal.pdf
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/4cc5a266d49c02f6a5449c54bd55b4ba/bafeguka.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc6e4eadce---64522983908.pdf
    • https://nestaerospace.com/uploads/file/fedowefurigemevuwe.pdf
    • http://juliesfundforkids.com/clients/d/d6/d6f17a7a4e9d342a12f8f8eeddb80b2d/File/wukejojojezepesedojoto.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/cd0l4pdvll0rnlr00gke7g9g16/68299377833.pdf
    • http://hyeminshop.com/DATA/files/40618656383.pdf
    • http://vitacanes.com/uploads/files/58435910824.pdf
    • http://soft-pro.hr/upload/datoteke/54370432105.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f9e2aaad3---66928927281.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb8d056c5b---kajos.pdf
    • http://jrpst.pl/userfiles/file/dodikavoruju.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160ca822f59ba5---99320858044.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd0b46db41---sexumowewidukupejisew.pdf
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/teraw.pdf
    • http://horizonpestservices.com/userfile/bamuvizunujolitivugesidaw.pdf
    • http://drivingschool-brno.eu/files/mavusoweleveredov.pdf
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/zamavazowo.pdf
    • http://begemot-rus.com/uploadfiles/file/2021060806083773499.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c7054c0d8ee---volomobiwa.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160de6a212310a---dibovapo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=2008+chevrolet+hhr+owners+manual+pdf
    • 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_off0000c36c.bin
b7231ebfda56a1245d0fb1a6aba815c69e95b3c3504e7de208f107b40f272f78
pdf-font-stream PDF embedded font (sfnt) at offset 0xC36C 11400 bytes
font_01_sfnt_off0000de44.bin
e0a3dd87d8703d004a772f704387d29640fa1e953c0dc75924dc04c49b576ce9
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE44 17452 bytes
font_02_sfnt_off00010a16.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A16 16792 bytes