Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e745501ea6f38bf…

MALICIOUS

PDF

79.0 KB Created: 2021-06-03 03:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1133e03bbe377c5c6ebca475696e81e0 SHA-1: 790812c46cd07c9b7d99a85d68ac9c41ddab7db3 SHA-256: 2e745501ea6f38bfd1656292cba2c0dc271d617f12f13ed7bf04356394ef7789
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm on disposable hosting. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic strongly suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://queure.ru/pbw?utm_term=what+are+the+qualities+of+a+well+written+creative+nonfiction PDF link annotation
    • https://pukukadusese.weebly.com/uploads/1/3/4/6/134666137/fazazunexe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493890/normal_604f8bd27a2ab.pdfIn PDF document text
    • https://josudirojupa.weebly.com/uploads/1/3/4/7/134729494/b595990bb7.pdfIn PDF document text
    • https://jogofevizu.weebly.com/uploads/1/3/4/3/134348232/8861007.pdfIn PDF document text
    • https://pepadamive.weebly.com/uploads/1/3/4/4/134468065/b5fd19bb562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459058/normal_6037cec4aa962.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4413007/normal_60afee6e1232e.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/0ba949a2-d896-45c9-9ace-112feb677b62/orbit_irrigation_valve_manual.pdfIn PDF document text
    • http://sorawako.pbworks.com/f/vewax.pdfIn PDF document text
    • http://luwivaj.pbworks.com/f/60872786279.pdfIn PDF document text
    • http://zajozote.pbworks.com/f/14405761491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12fafc18-9f48-486b-ac77-9325ce1c5b15/kwese_iflix_app_free_download_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00abdd2a-4a0b-4298-9193-4514f0de2cb0/bobubi.pdfIn PDF document text
    • http://jebusolole.pbworks.com/f/66172833965.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/kadasexugaban.pdfIn PDF document text
    • http://fokopaviwu.pbworks.com/f/wajifebidifogevipu.pdfIn PDF document text
    • http://lufokomarib.pbworks.com/f/alphabet_handwriting_practice.pdfIn PDF document text
    • http://jizakatum.pbworks.com/w/file/fetch/144506667/firunegas.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5D 5140 bytes
SHA-256: bd9a770009f1c29cbe3bf41b586a66333b82dc1b1a4407a312b7f52403d3bcec
font_01_sfnt_off0000efeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEB 2092 bytes
SHA-256: 6e5de5c6bcb7fdd8c5ca0d25823a8f80e6c764803c1b732dbc9c425a5c0f8ea5
font_02_sfnt_off0000f991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF991 10552 bytes
SHA-256: 35e31a8d7f1b0086ebf9725dc7af0cb370b931e954de3ec495639e61193111c2
font_03_sfnt_off00011d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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