Malicious PDF — malware analysis report

Static analysis result for SHA-256 066b258bc9c46630…

MALICIOUS

PDF

94.6 KB Created: 2021-06-14 22:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ca79aaaf66cf86011390f87c24888854 SHA-1: e7cb2894d932cd090fb281a0183b5c19f0e5a3fa SHA-256: 066b258bc9c46630092614513a67baa35c157682085645291d6a284302576fb1
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pistant.ru/uplcv?utm_term=counter+blox+wallhack+download PDF link annotation
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/559c78f7ff376681ecbda38828684b3f/zedewebomokakovop.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cea7deff12---19725327674.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/2c4c6ea461203120b09ba06af8a5a959/perugade.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c710ecc9e1f---rodunenenotigamixelinagun.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3b58a9a20---35757086850.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/jadizowegujolobamuwam.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/26ldglelki34a5chmj9sdgtsl8/99177506952.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160915a8387e22---59334064087.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080e5254e13f---tanigatobu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728508a397c---98191219551.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/5vbr5tajfpgi2b0b7figam4180/verufor.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/lorimowimuvagiboxeko.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/a4dd38eda17b7a0c4cd04499bce0e8b0/wetikusor.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/9737d0b2c69e9736b102ba1d73c7ee73/52077690175.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd137877cf---33720802539.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/bf87dc7c24f88d308c449c12a1e086a3/kopesaxejelifevote.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86F 6424 bytes
SHA-256: 91838cdcd5e0aafc5bf0af0349e66d06387e1551d24a013491c16510681f740e
font_01_sfnt_off00010851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10851 5116 bytes
SHA-256: 1cb2f53b269723c55de0d44a9066d29fed939fa4eb781cd7ad157656e8fbdaaa
font_02_sfnt_off000119b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B5 2140 bytes
SHA-256: a1c68180eae955d710b1f59d89b7b5bb1f22246194deffa7b9c3298859733f9b
font_03_sfnt_off0001238d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238D 15004 bytes
SHA-256: f749599032eb776a8be174a2ef78c97739acbc0a6424207f5dcf63adb1e5205c
font_04_sfnt_off000152c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152C8 16912 bytes
SHA-256: 73f0e6e4dfa992c4b4a1dc2fc51f5c20f597f44431a707d060cedd411f47ebaa

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