Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f78de11ee69ac02…

MALICIOUS

PDF

93.6 KB Created: 2021-07-25 00:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: aa2370a8e7f844178223e96a4c2424d2 SHA-1: 160c587fc188fbf5d67dc4022668d50f1f0e9fd1 SHA-256: 6f78de11ee69ac02ba20024451d3ddef432f3ad7829c696b19513200bbd17cd9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS uploads or disposable domains. The presence of numerous PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly suggests an attempt to distribute malicious content or phish users through these links. No scripts were extracted, but the overall structure points to a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160863dfea7988---bisejoxivolimasag.pdf In PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092cb6825250---57359290774.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/bozali.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/dalasoziralax.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712eb828261---23628232858.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c23dcaf1b---kubizix.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/kapibobadozibures.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/rebawizidekugesemugufebol.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/zekesalikako.pdfIn PDF document text
    • http://eastindiaspray.com/suvra/eastindia_spray/files/towiwixedekojosugapazot.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/borusizalekukuwuvi.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c66dc297ae1---38937871379.pdfIn PDF document text
    • http://industra.sk/userfiles/file/linunoleselini.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5fa67e227---wizadepodadonikorerazere.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc7cc19280---57431911036.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e612186d3---tanukilobixigimiwifule.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/80914282977.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/f8a596b91e2bdc6a7233ca6aad3f58b6/xomeginuk.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/mekegufapomugazowura.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcb8143e14---fadokape.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/gikevaligusedowu.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/dd1c1a73f5a1bddc4ceb4cf6d6369a1b/saxuxon.pdfIn PDF document text
    • https://defaico.com/d/files/41414960548.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+to+bypass+icloud+activation+lock+for+free+without+computerPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001060b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1D 17744 bytes
SHA-256: fe82334f73ebc45c2b3b2435f4124ae7b7bb61d30048ccd1cb827cf6b399c0b2
font_02_sfnt_off00014cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CDD 11476 bytes
SHA-256: 16b605aa8e50f108d0d5418f66c03b070a620585ceaa3925a62e3997696afaa0

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