Malicious PDF — malware analysis report

Static analysis result for SHA-256 4223400d2c08fa06…

MALICIOUS

PDF

79.5 KB Created: 2021-02-17 11:54:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2784f9800035688ebcbb62a1c913c732 SHA-1: 7133fec9294d96ab9f3fba4f923d5e3f62930edf SHA-256: 4223400d2c08fa06717f324857d7f0340ca9d641e3d364ce66410118602fb93d
282 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.001 Malicious Link

This PDF document is identified as malicious by multiple heuristics, including a critical finding for a redirector link and brand-impersonation credential phishing. The document contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm designed to host phishing lures. The primary lure impersonates Facebook, threatening account termination to coerce users into clicking a malicious link, which leads to a credential harvesting site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://kurepisafigovu.weebly.com/uploads/1/3/1/3/131398088/pinibogubafu_gefagofu.pdf.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crophysi.ru/wix?keyword=roblox+hacked+account+list+2020 In PDF document text
    • https://kurepisafigovu.weebly.com/uploads/1/3/1/3/131398088/pinibogubafu_gefagofu.pdfIn PDF document text
    • https://nezivubu.weebly.com/uploads/1/3/1/3/131384481/56fa923b18e5.pdfIn PDF document text
    • http://winsl.space/what_makes_a_good_speaker_wire6z0f8.pdfIn PDF document text
    • http://webpost.pro/the_moorish_empire_bookg4p5c.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/00f22cd39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425224/normal_5ff9d7cda6a43.pdfIn PDF document text
    • https://xevujudibibabus.weebly.com/uploads/1/3/4/5/134599482/2210854.pdfIn PDF document text
    • https://kotutoxegaru.weebly.com/uploads/1/3/2/6/132695780/8537220.pdfIn PDF document text
    • https://pafegesufo.weebly.com/uploads/1/3/4/7/134719460/9198331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382779/normal_5fe9d11d0df1d.pdfIn PDF document text
    • http://eroganoficial.site/zonuzonamcy.pdfIn PDF document text
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/1534729.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473645/normal_5ffe272fcd2fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371786/normal_5fef01b394338.pdfIn PDF document text
    • http://maddot.space/vefivezilutq8hin.pdfIn PDF document text
    • http://theplafond.xyz/11637132054hxq6z.pdfIn PDF document text
    • https://mixodozom.weebly.com/uploads/1/3/4/3/134333910/sixumevudan-piwudo-wetorag-luwojipolo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tokit/cs_camera_scanner_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/rifuv.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/13545670492.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/total_english_placement_test_answers.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83D 5484 bytes
SHA-256: fd661735c7945d91b49ca57270c249dddbfb337e70402052b81d87aefac79f6c
font_01_sfnt_off00010ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE5 10952 bytes
SHA-256: f1baebadb596ed0c9627fd14b956b54bb30e5580053006f4d7a018fd6d752732

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