Malicious PDF — malware analysis report

Static analysis result for SHA-256 0677e3f917d55292…

MALICIOUS

PDF

63.5 KB Created: 2021-06-24 00:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0d9c925a31062b619d1c1b9a022bb7e3 SHA-1: 949d086d95892bf573f7f964e6ac0b464679a8b8 SHA-256: 0677e3f917d55292cc081fc8e482386df21d06a4d4e4e4407b9b35725cd276b5
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be related to 'Give me liberty chapter 5 review questions', a common lure for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links indicates an attempt to redirect the user to malicious content.

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://smidgel.ru/uplcv?utm_term=give+me+liberty+chapter+5+review+questions PDF link annotation
    • http://alessandrobelleseveterinario.eu/userfiles/files/68483514084.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210614101140162584422.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/pivijid.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/b95ec08a641044b904cf3ad73c840cf5/pafabedimawurafuxupa.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/4s3aa2isfjbftvbi9a2ah1v297/batogatusuxo.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/50399607621.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/cbf4f3fd9af9b721d74e3e9cac97c1a5/32560529211.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/1571610856.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d22df3ad1---jatofobigelip.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/2c501f678b1efc5ad6c43a37ae6ecc36/60709522454.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/nuwesoredege.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/36486091996.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/0l4ajoq3347e0m317ta8atqc17/tabitavuwozi.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/16e0f8604591cc7e646365c4b4004d41/58829729170.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_off0000babe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBABE 5848 bytes
SHA-256: 4c264f286697fa7fdaafd4a38aa9b8f067d528fd9313e74171d6556467c950c7
font_01_sfnt_off0000cea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA2 10068 bytes
SHA-256: 0ee4b5206b3a7f2f58c9f31a90c53331cb78f5c55b567d4e1978b6199ca147a9

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