Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc9b804af2976c8…

MALICIOUS

PDF

94.3 KB Created: 2021-07-19 07:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 9f98401328566ef368f2d473581afec9 SHA-1: 5acb8e58ada716990419905b6a02f8731d186eae SHA-256: 6fc9b804af2976c835d8a2f0e7d7668640619321d428c466257dfd2429594d5e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple domains, some of which are hosted on compromised WordPress sites. The embedded URLs and the PDF structure suggest an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

Heuristics 6

  • 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.
  • 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://alohatoypoodles.com/clients/1/11/1122824db0f83c9e74cf39311881f217/File/66892296448.pdf In PDF document text
    • https://pnlcoach.com/misc2/file/In PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aafb506fa51---11541393929.pdfIn PDF document text
    • http://ourhkg.com/UPFILE/userfiles/files/suketivorozaxaxizaz.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/5315dcce1e60e53f4984cefa2ce3a23c/87609619690.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6b6c6921a---pelanavojomuzok.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a14c8df9b5---rujupeganowipopolanivopu.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/832c8130bdd0be484cfc5a90c480c2df/moxitasidofesilimowajazud.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/62888747402.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d45dfa99d4---fazefo.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/4qbl2ag5e30hnb85nef4mlk96q/wefavapudujanimuvi.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/61876319138.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b8d6f97121660afb7bba43ac43dc7c1d/97261750060.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/535b04c048069e55f2e3f64d44efe345/45616859346.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4348704b8c---nirijaxazividomesexep.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160f2a3735dad0---33327475069.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/9fb18b1f0268040795085305b55d6e1e/wekogozabozoweteje.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/sivomefovuxavagetu.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/78091237098.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/xevovawupivibav.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/bopufujuz.pdfIn PDF document text
    • http://abc-tel.ru/data/File/79083291475.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/9069522273.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/fataz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=warframe+pc+ps4+controllerPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10127 10620 bytes
SHA-256: db94ce475b730cc4aeafaaf1d25febe69063e3b7b6a7fc9b05fede79f73ed31d
font_01_sfnt_off0001197e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197E 18596 bytes
SHA-256: d37a197f517beb5303e0e4d7494f3ac82ae6ef829e99f9ca005d4ab1cd5954b4
font_02_sfnt_off000149aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000161b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161B7 1776 bytes
SHA-256: 5863de6d8e6a22f21f96e79ccf13d96a1a6e1af2f6c7c32709591e23b8521cf1

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