Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c565adf818c42d…

MALICIOUS

PDF

78.7 KB Created: 2021-09-05 05:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4799d5dfb73aea6560e710822d423f5f SHA-1: ffa7895cbe0998977f4346a9d7d07c0530061af8 SHA-256: 07c565adf818c42d8ee152b44956e64bb816667f1d091175abb8deea3b3b4845
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting. The presence of external URIs and link farms suggests an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://archism.ru/uplcv?utm_term=mi+air+purifier+pro+manual PDF link annotation
    • http://eltonltd.ru/sites/default/files/uploads/90304120902.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/34508334557.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/zagokutosuwa.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/71609862309.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/c06f07cb201d358a38d56da01aa6f03e/38968693924.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/jinumevanarejib.pdfIn PDF document text
    • http://labsshop.com/d/files/mopanejovusaxolevaraxob.pdfIn PDF document text
    • http://turksebruiloften.nl/userfiles/file/94329244551.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/junepi.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607051cb41926---40299445735.pdfIn PDF document text
    • http://ttc-investco.com/img/files/72679135563.pdfIn PDF document text
    • http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/72080434812.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/liwumefejigov.pdfIn PDF document text
    • http://kondicionery-pushkino.ru/upload_picture/file/dujadisa.pdfIn PDF document text
    • http://iziusb.com/userfiles//file/bisivezelijafafifasut.pdfIn PDF document text
    • http://hujiangsy.com/upload/files/xikofevadepila.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160974d5f5623e---69664221881.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608e35f51cc85---6280026790.pdfIn PDF document text
    • https://cpsguffanti.it/uploads/file/xapikevivoxokaxatewifezi.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607e25a583894---47624788491.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/59a5f44f7ceabe6864e356efc1bd73d2/54469244688.pdfIn PDF document text
    • https://hanmarklight.com/UploadFile/files/82365655295.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_off0000d02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02D 17876 bytes
SHA-256: 7fc2aa3aae7b1b442c01437f4ed5030972218c2d93aa6697180d790c184060c6
font_01_sfnt_off0000fe65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE65 10348 bytes
SHA-256: 6b4a128cd13b829d227b24fac5ebc56dd147b86a33f5bf075f2e096039808ebe
font_02_sfnt_off000115a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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