Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5d254cb137695b…

MALICIOUS

PDF

84.6 KB Created: 2021-03-01 22:46:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5270cf750f052df639b5e8e2bfcc9252 SHA-1: 6a08b294a018cc72aef98d194619d276eae47d71 SHA-256: fe5d254cb137695b595055fe3f35a95c9088202e87c2ff4111255312bc2e8c08
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://soxebez.ru/aws?utm_term=when+things+fall+apart+pema+chodron+sparknotes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486758/normal_5ffeb4d5456a5.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/wiegcjc/that_s_all_thank_you_in_spanish.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368747/normal_6005b9b01e27b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372076/normal_5fee8cc249b9c.pdfIn PDF document text
    • http://urro-hu.com/49874599695f0n5r.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/ZPnjhhe/xojisetofuniginul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_603022232be46.pdfIn PDF document text
    • https://cdn.sqhk.co/wabogojo/HogeZLB/the_dark_pursuer_mod_apk_1._71.pdfIn PDF document text
    • http://uscarins.info/how_to_pronounce_arabic_words_in_englishod3zx.pdfIn PDF document text
    • http://itali-big.space/91561659124mfpco.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417809/normal_600a85ab8f4a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413587/normal_5fea047025de4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fivajopafovile.rf.gd/korenagulowifojozozego.pdfIn PDF document text
    • http://dafawesag.epizy.com/performance_parts_honda_civic.pdfIn PDF document text
    • http://fezadup.rf.gd/boxholder_request_format_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/product_presentation_template_ppt_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/90284350658.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/pemijefilasepunakuvar.pdfIn PDF document text
    • http://nifiwirijapokaf.rf.gd/how_to_tie_a_turks_head_knot_youtube.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_off00010cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC6 5648 bytes
SHA-256: f0c019c46ef0823b68813d8ac93d7fc1646d56176e8205d5adb44fddf8b08df8
font_01_sfnt_off00011fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE6 10844 bytes
SHA-256: 5c6251fd86e878503d6a2a7ad0ab2433df81981dd0b09281856fd24a5113d93a

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