Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e38cd58b009a19b…

MALICIOUS

PDF

80.8 KB Created: 2021-06-23 05:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c7dba828f2ad6a9e55208050b1e6585 SHA-1: 108c06650ec6e4b59c0aa54b13c3cf6011710d06 SHA-256: 1e38cd58b009a19bb9f616d418678d8a1e935fb8a481dd8f9c94856c9b21eb24
126 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan attempt. The document contains numerous external URIs, many of which point to disposable hosting or unknown domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit vulnerabilities or lead users to malicious sites.

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://norigawe.weebly.com/uploads/1/3/3/9/133988483/seguwog.pdf
    • https://berizekaxijaj.weebly.com/uploads/1/3/4/5/134501449/wulevetupe.pdf
    • https://static.s123-cdn-static.com/uploads/4475196/normal_5fedbe9f07d0a.pdf
    • https://cdn-cms.f-static.net/uploads/4489583/normal_603bf2e5b48cc.pdf
    • https://cdn-cms.f-static.net/uploads/4408481/normal_60bd39be173f7.pdf
    • https://static.s123-cdn-static.com/uploads/4488572/normal_5ffddfae1bcff.pdf
    • https://zimatesuti.weebly.com/uploads/1/3/0/8/130873828/c20815c5a62336.pdf
    • https://gavibokilixebil.weebly.com/uploads/1/3/4/7/134716725/cb07bc7dcd10a.pdf
    • https://mumizajasaliso.weebly.com/uploads/1/3/4/5/134598274/vuvixev-puputisodinu-wesubawinaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/razvivatel/yapz/~3/iXsW93xxTQA/square?utm_term=prefix+and+suffix+worksheets+grade+6
    • http://poguvovuk.pbworks.com/f/tafsir_ibn_kathir_bangla_app.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60c7878c9151665706f5abf9/1623689100959/tabegejapefov.pdf
    • https://uploads.strikinglycdn.com/files/7e2ac528-c1be-405f-85c1-b9b13c50823c/gilbert_and_barresi_developmental_biology_12th_edition.pdf
    • https://uploads.strikinglycdn.com/files/007ee173-7946-4778-9d1a-954f50445fbe/lukasesokawipipexowugav.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60d22134d1c3922494cece26/1624383797083/57120828689.pdf
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/145004334/peshitta_bible.pdf
    • http://gufikugefisu.pbworks.com/f/75446172367.pdf
    • https://uploads.strikinglycdn.com/files/813ee743-b7bd-4fa5-ba2a-f54b82ca62b3/nonefubegaw.pdf
    • http://lopofemusun.pbworks.com/f/algebra_2_volume_1_houghton_mifflin_harcourt_teachers_edition.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbbf.bin
8eb47d5894a2fa7a2ddda07932bac67ee91dc2f6aa0b9b3b52f1536b3b2e23bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 5516 bytes
font_01_sfnt_off00010e9d.bin
d8c431ee1fcbed1e25be3ba6a1c9aea01c95e7f33a4861fc436c5ed2bdd52b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9D 11104 bytes

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