Malicious PDF — malware analysis report

Static analysis result for SHA-256 e72cc8393eef22ec…

MALICIOUS

PDF

70.1 KB Created: 2021-02-22 08:07:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 639e429befd790f6bf2a4986d4442072 SHA-1: cf32581a0fa7fbec7f07f183ba4cc2fa2b95cf55 SHA-256: e72cc8393eef22ecaa5dd6b85f69684a1d51a0103d2b85f0114724ac2dbb965d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF was flagged by multiple heuristics, including a machine learning model and ClamAV, indicating malicious intent. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious content.

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://jottigo.ru/123?utm_term=what+type+transmission+fluid+for+dodge+ram PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4487918/normal_6006e21245632.pdfIn PDF document text
    • http://turekawetareju.iblogger.org/80668989640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422914/normal_600e9e6681601.pdfIn PDF document text
    • https://luzurojavozajin.weebly.com/uploads/1/3/6/0/136090511/1994500.pdfIn PDF document text
    • https://mewatejo.weebly.com/uploads/1/3/5/3/135322937/bisisa.pdfIn PDF document text
    • http://daxosivonoz.iblogger.org/stages_of_language_acquisition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449014/normal_5fde3618c0270.pdfIn PDF document text
    • http://kutakelipaxeb.22web.org/99938842856.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373281/normal_5fe22e7de9b1d.pdfIn PDF document text
    • https://suxekupawuva.weebly.com/uploads/1/3/2/7/132710704/9987956.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://s3.amazonaws.com/rodakarugupoko/54076716413.pdfIn PDF document text
    • http://revifobatuge.rf.gd/angina_ludwig_adalah.pdfIn PDF document text
    • http://bosefijov.epizy.com/how_to_use_manual_capsule_filling_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/urticaria_multiforme_fever.pdfIn PDF document text
    • http://fepebojinozid.epizy.com/71539213584.pdfIn PDF document text
    • http://lekekavom.epizy.com/65313369022.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC888 5452 bytes
SHA-256: 686f99d1d2f12ac29d698115ad6b44afa83be22a71983a59f33548abee690b1e
font_01_sfnt_off0000daf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF8 10048 bytes
SHA-256: 2758f5d3ff846ae90fa663f45dfd7ee42e0050536eb713415255ee42422c7d0e
font_02_sfnt_off0000fd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4D 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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