Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e43bb1c99d83bb0…

MALICIOUS

PDF

72.4 KB Created: 2021-09-06 18:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3be218b354fb3715e174bbc5c831d78b SHA-1: 2c6c88cbae078c3d5334da9deade3e3710e04ffd SHA-256: 0e43bb1c99d83bb0a1d540b531b32bb20070d21632d55905f911d4cd3edc2c84
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload delivery. The presence of multiple external URIs and link farm heuristics confirms the malicious intent of distributing traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://coretry.ru/uplcv?utm_term=dash+diet+weight+loss+plan+pdf PDF link annotation
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/e82d38c5b21a3016bf58f58d189d7f40/witorelamagorup.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/72091926250.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/74535011188.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877f327b835---junakufo.pdfIn PDF document text
    • https://sgicorp.com/userfiles/files/65406972882.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16096caa8015f6---76753281211.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-8-21/20210821143456726163.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/35631833298.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/d307ffee98a7c924c31324d4386f93f9/69008770536.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/xexokefikegifuvurodig.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/wuropoliso.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/44557361106.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb3add3e64---komemad.pdfIn PDF document text
    • http://rrarental.org/upload/file/gazagopelegorilekosora.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c667587dc08---72574278750.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/ziromebujexinoronobeba.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/42j43gs5ves6oons4diomdhh81/96410736016.pdfIn PDF document text
    • http://ustunongel.com/image/files/lofof.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160879a2da222e---jinotijove.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0315213ce---zobevozozo.pdfIn PDF document text
    • http://olympusflights.com/files/files/29994543783.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/g22ko1gcsllu5236i275u414r2/95013294424.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/tofepuxu.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_off0000ba5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26E 16016 bytes
SHA-256: b4098638899b2939726fd5b063d5d26c81fcd9ebf130620dae1d823c4b430cdd
font_02_sfnt_off0000fb87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB87 10764 bytes
SHA-256: f8be116c8b97c619019dcee055253f686189a1100c97d8551648db574ddb7036

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