Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da699ae43102a53…

MALICIOUS

PDF

69.0 KB Created: 2021-09-03 15:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0665604906f756765b1e27cdd5643baa SHA-1: 3d9f5cfda4e09f3e466820db6e9dae2fed3a37af SHA-256: 8da699ae43102a53dfb2662edfaebc30e927f55c9ac728d08a6153c2c4ca3fc2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload storage and disposable hosting. The primary purpose appears to be redirecting users to potentially harmful external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/b68b99151fcb9255257d9d4201182a86/17528060479.pdf In PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de4c5e447f---lesatufumaj.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f087cc0a46---78680067380.pdfIn PDF document text
    • http://coytex.net//ckfinder/userfiles/files/60977213739.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3a45b1ee6c71b816787db621b8f5c5f0/36875925057.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/86475744385.pdfIn PDF document text
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/padunukiluwusasavuzisud.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/mobifepaxemibizit.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16082623ef3d63---mubojomajofamenufijasavo.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3141cf816---dejekulawu.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/tujenimidojipuk.pdfIn PDF document text
    • https://jjpremiers.com/files/vekevuvowovitoxaroxipitij.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/17961852470.pdfIn PDF document text
    • https://silverwayshipping.com/userfiles/file/duvoxaxavaluragi.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/fuzar.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609d14622738f---52295771387.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/3102093994.pdfIn PDF document text
    • http://dentalcenterstudio.it/userfiles/files/39680484651.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/e732c56904dd9d5dcc0a7d99fc624661/jokonusazunuzagironeki.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/9ade96da27e7126757950ba324df2e95/50634139519.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/8d1d393ec049a4c8a2616b9ee6b617d5/repubuwuzob.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f702812bf8---famev.pdfIn PDF document text
    • http://royalgroup.at/tmp/17897265996.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=personal+details+worksheet+eslPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E8 14816 bytes
SHA-256: d35a6bf4b6711df7131db6b1d0a864046dd2304d39965007fb6f190f5ed7656a
font_01_sfnt_off0000d6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B9 10524 bytes
SHA-256: b2eba6ab1831bab61ea474f4d7388c487a2e6169aae1f94291dfd29001bc82d1
font_02_sfnt_off0000eeb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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