Malicious PDF — malware analysis report

Static analysis result for SHA-256 0799501eb7463414…

MALICIOUS

PDF

64.3 KB Created: 2020-11-17 16:28:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5c8f6f3941df1cefbea19546467c910b SHA-1: 4c4ac479512d7d73d6cfffdde549a7b388107a8a SHA-256: 0799501eb746341428df19deb89f65654e1784bfe41faa3592faaf3531582586
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors or link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://cctraff.ru/123?utm_term=el+dorado+springs+mo+school+staff In PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/depeviteroxovasagela.pdfIn PDF document text
    • https://muvitaburire.weebly.com/uploads/1/3/4/4/134441723/9c1ed17bd1ef7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_5f9862d3e8581.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/refub.pdfIn PDF document text
    • https://xufetujada.weebly.com/uploads/1/3/4/7/134745175/gogetonoruvup-dized-fovowo-tewuxikul.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/sixatuzatena.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f89b0db07f08.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1127f8ea-5152-4dc8-a1a6-e8f61980be75/mitezo.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/download_my_oldboy_full_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/annie_song_john_denver_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/the_perfect_law_of_liberty.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/disaster_recovery_plan_aws_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD3 5196 bytes
SHA-256: 58a28af5e1a1f5ce33bf3db04b9d27a1ca6b2f808597e1199ad26543562b7bbc
font_01_sfnt_off0000c14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC14A 11036 bytes
SHA-256: 64663f517e3d3233c8b45aec6be58bc18ca2696593402cb289f3c4fbc5e79d06
font_02_sfnt_off0000e639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE639 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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