Malicious PDF — malware analysis report

Static analysis result for SHA-256 8afc5488bd0b19f8…

MALICIOUS

PDF

84.5 KB Created: 2021-06-29 01:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6323db8bc45c7fcfc817cd56d1667ffb SHA-1: 000ca5af281ec38e16e03eb964e84767f3005314 SHA-256: 8afc5488bd0b19f86435dc1ac66d33e4698100a8d54940a8ca38a20ce4539641
164 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers, indicating malicious intent. It contains numerous links to compromised WordPress sites, suggesting it's part of a link farm designed to host and distribute malicious files. The presence of a 'download button' heuristic further supports the phishing lure. The document likely exploits a PDF vulnerability to execute a payload or redirect the user to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • 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.
  • 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://krisoc.ru/uplcv?utm_term=black+and+white+ladybird PDF link annotation
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/a048285fa7d61d69e4b0004f149ba496/guginadowemasifego.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a594953a7aa---76406254685.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/piwudoguvimitumulavasi.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/1db078731987a38ae147a4d7f1be22bc/tuzow.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d16fb5eed3---53357652201.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/e6949847a3efcbbb8c9f0dd2528d2cb7/dejufivetonowawedojal.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/muc27obu6tcjasmres2ql68fj6/ramivulelulukizufijibeni.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/poponatugafisumepisuja.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/5ac300297359c61731c09d07a3303d6c/xutezolebej.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/o3u79ftbo0m6pslghbtkc8r3jt/rerevuparapozudesizutefi.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/ginixiwixelabufejoxe.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/1oiqcdc470i95p69goi03d981s/55122807633.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6dca7476d1---kebotegum.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a241c4de39b---33889934088.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/29f526135717e33e7e72e13fca26ee63/litoxefazufan.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16090b304a08fe---bidilikiwaduroke.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd77d0f20d---jamogid.pdfIn PDF document text
    • http://vodnik48.ru/content/file/49010901708.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/44815390838.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073536acadbb---33685455221.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/cb6c7114be677c3a0c1d134917cb0f2d/notariwofagupubepijegi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE846 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001005d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005D 10664 bytes
SHA-256: c5677f526b455ba84b5f680ddb7c08bd53bcf75d61cc66fc54dd06d41abd1203
font_02_sfnt_off000118c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C6 17156 bytes
SHA-256: 0d52128b8af24ed36e023da39fcbc546a6f9e90c1f148b6bcfe1005add78ea44

Open this report in the interactive analyzer, or submit your own file for analysis.