Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eaf31dd2dbd4b0f…

MALICIOUS

PDF

82.4 KB Created: 2021-06-30 17:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c9dc90da1454e9055bbb7542f09d442c SHA-1: cdc7423aa2999dcb2378649ee83f16e9beeff02e SHA-256: 3eaf31dd2dbd4b0fc35dac90d8d4e5df49b7e334714a5a7693dbe8290212a469
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/baf9cf50d099af22599051db724de973/nelatapuxowi.pdf
    • https://uclerbaklava.com/resources/file/jexudosopide.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/a9663c9c3ed704a0f4f0e9b6e2027a65/35805853603.pdf
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/biwasebemititi.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ce2cd114d---womovij.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160866cbec5a44---poxexedorisetitapabu.pdf
    • http://techbis.pl/files/file/23906083024.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d9200ceb6---74122047282.pdf
    • http://breakevenpoint.pl/uploads/editor/file/39265448038.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/b79ff087f24443b9f1547b4e23c134d8/waderamunupaveju.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607525a15c6c7---56565308326.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc94135917---fuvamexonelewul.pdf
    • http://www.conectadoscomdeus.tv/arquivos/file/dijakegu.pdf
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/e4d522999d8e1323ae064477ba8ea775/vogotazeduxumasom.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7d46353f0---63883984319.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730c6cc7b25---kenexa.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/f2302837c7dd980f44d76417b24538a8/98301648850.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160760ac3a5c8c---mesoviramaj.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794206efc26---sorabolozovogajopedadud.pdf
    • https://glycocalyx.nl/userfiles/image/file/jidowob.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=internet+of+things+in+manufacturing
    • 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_off0000e0a6.bin
0ff4c6618b98e07319cec75fe099b611dd8747be1a38873c56e25a03044f48a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A6 16588 bytes
font_01_sfnt_off00010bf7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF7 16792 bytes
font_02_sfnt_off0001240e.bin
087c1b359949ec3a368e3e272f396a38d78f6e4904289ee4c54fedf8b986d13f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1240E 10788 bytes