Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2e21157870d7d7…

MALICIOUS

PDF

76.0 KB Created: 2021-03-12 08:21:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: eb21fdf44df3138ba5d073b1142b5635 SHA-1: eabf401a3fcccb4de26cbc7faf9aab89fc6be040 SHA-256: 9a2e21157870d7d77dc605cc29cc678087cef12573ed3753041c0d6a5f6c419b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable hosting or unknown domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains references to 'beach roses for sale' and application metadata, which likely serve as a pretext to disguise the malicious intent of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=beach+roses+for+sale PDF link annotation
    • http://hotita.space/68457509712h3pqo.pdfIn PDF document text
    • http://uchebnoe.website/soccer_superstar_gamevil_apk0sthk.pdfIn PDF document text
    • http://mnclassis.org/what_page_is_dictum_on_in_to_kill_a_mockingbirdcerlr.pdfIn PDF document text
    • https://tugadebijo.weebly.com/uploads/1/3/4/0/134042488/vixatu.pdfIn PDF document text
    • https://mufudoxideli.weebly.com/uploads/1/3/4/5/134508761/8215543.pdfIn PDF document text
    • https://cdn.sqhk.co/lifudidu/iififNg/dikabelureki.pdfIn PDF document text
    • https://cdn.sqhk.co/luridixajix/76uljco/31316777305.pdfIn PDF document text
    • http://obschee.xyz/nezisozinotovokexikb31u.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/iMhagdt/pdf_document_scanner_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sidegiri.epizy.com/apache_tomcat_8._5._31.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/33241230180.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/metalemo.pdfIn PDF document text
    • http://gixisenusadat.rf.gd/foxit_reader_for_mac.pdfIn PDF document text
    • http://jarunotaso.rf.gd/converting_fractions_to_decimals_coloring_sheet.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_off0000e28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28C 5016 bytes
SHA-256: 9d8766ca3e7721f05595b7f6a5e64d0bede68f9c5f5384a110e8943c4773b3fa
font_01_sfnt_off0000f396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF396 14932 bytes
SHA-256: 1aa9c9f85bce3e85c23c2ba9d34eb0134df95b6d1bfbb9a6b9bf394472e8088f

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