Malicious PDF — malware analysis report

Static analysis result for SHA-256 32479e0330f3a477…

MALICIOUS

PDF

76.8 KB Created: 2021-03-14 10:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 90e82b95936261a841dc35ed6d67998c SHA-1: 2dae0d77da541caf2278d858291780ec40596fe9 SHA-256: 32479e0330f3a4770bc2c2daf2e51d09fcc3631d77e2ce8644f2dd2dc513c2d3
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://botokaw.ru/strik?utm_term=blade+inductrix+fpv+pro+rtf PDF link annotation
    • https://polatoni.weebly.com/uploads/1/3/1/3/131379392/tepena.pdfIn PDF document text
    • http://somirolixikaf.iblogger.org/jasigijasekonutizisab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490950/normal_5fcc3be2f3756.pdfIn PDF document text
    • https://xobisopi.weebly.com/uploads/1/3/1/3/131379629/2649c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378620/normal_6009ffabceffa.pdfIn PDF document text
    • https://gozuneputir.weebly.com/uploads/1/3/4/3/134345179/ce557b2272f2b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mojuwuf.epizy.com/credit_union_salary_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f736233-b1b3-4234-93a6-9398a96ad82e/how_to_use_young_living_thieves_oil.pdfIn PDF document text
    • http://muzoxed.rf.gd/63148275626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4bb79d6-06fb-45b4-a9cd-5d5b2c93ac09/how_to_find_b_in_slope_intercept_form_when_given_two_points.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/pepezasagijeferulix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e109fdf-99dc-40df-89af-a8484dddfa31/lagoderavusekunofeterinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fec3e949-60b5-44f1-9a0d-d3942fc2ec67/j.r.r._tolkien_on_fairy_stories_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/food_stamp_guidelines_indiana_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/monster_hunter_illustrations_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff8deb6-08d7-4571-95df-fb2340336f0e/60482385960.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD650 5148 bytes
SHA-256: 148e7ed89debe2b3d3b72aba8ed57a8ef9b511c81d103e83bb1ed41ce8e59cc8
font_01_sfnt_off0000e7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F1 12028 bytes
SHA-256: ca2305b6db65103dc52c5f885bf058ae314a34151254094632f27636c63b9c2d
font_02_sfnt_off00010ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF6 16376 bytes
SHA-256: 4954ddec54c61b6acc7eddbac306bc890d05f3afdfcf3ae890c7612da0a7d668

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