Malicious PDF — malware analysis report

Static analysis result for SHA-256 300cae6a889eedaf…

MALICIOUS

PDF

64.5 KB Created: 2021-06-10 18:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e618070d3890025d6ff0976857cb1560 SHA-1: 2b8c9131c39435ce7c37384fbf2ae8fa1d2d95ba SHA-256: 300cae6a889eedaf72f7a7c2456a75303168e218bffced441119f884aea9e084
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. The presence of numerous external URIs, many pointing to compromised CMS upload storage and disposable hosting, suggests an attempt to distribute malicious content or redirect users to phishing sites. The document body, though heavily obfuscated, contains references to 'jb gupta solution book pdf download', indicating a lure to entice users to download the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://garglob.ru/uplcv?utm_term=jb+gupta+solution+book+pdf+download PDF link annotation
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/9ec8ab24341c8a5bb540050d2d1f5d0c/zupabevidifax.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a42d6ddd---jerododenolotozavilaw.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/280800077114.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/liregesufovo.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609eefb13b001---40435581034.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/38830064069.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b86e59038---64541666620.pdfIn PDF document text
    • http://proxima-design.cz/files/file/fenanovitimuvagifuru.pdfIn PDF document text
    • http://zae.me/datafiles/file/80122578630.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/e6c468454e257409d8c94b4ebf1619af/telodanela.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16072ac3b1abb7---pezewozeb.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f897425199---19124279061.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160828eba4725e---xelowevenida.pdfIn PDF document text
    • http://renovator.cz/files/file/fimij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF13 5400 bytes
SHA-256: 4c10863ca3d29feb9d6beb84f255dc0c3886592be63b43152091d2fb46579f08
font_01_sfnt_off0000d199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD199 10380 bytes
SHA-256: 95ce0c3a15adb7733030d230aaad359abc8cf7c107c3710e8b89bbf5c85b1cef

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