Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b2265fe1f695a5…

MALICIOUS

PDF

66.3 KB Created: 2021-02-08 22:57:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7bd00e37213cd328dbe559622dee0e7c SHA-1: 27350a5879514b558785224e850e1fd53b9945f9 SHA-256: e8b2265fe1f695a5d4bccd3cb540e51cc76f290f655956710ab3ab8751feabd0
134 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The 'SE_INVOICE_LURE' heuristic suggests the document's content is designed to trick users into clicking links, which is supported by the presence of numerous URLs. The primary URL, 'https://jottigo.ru/aws?utm_term=barredora+manual+escoba+magica', is likely part of the malicious payload delivery. No scripts were extracted, but the PDF structure and embedded URIs indicate a phishing or malware distribution attempt.

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/aws?utm_term=barredora+manual+escoba+magica PDF link annotation
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/fitazazuwux.pdfIn PDF document text
    • http://rutomatuwusu.22web.org/gadolujarujib.pdfIn PDF document text
    • http://bestcreditcheck.info/85594360380sq6wn.pdfIn PDF document text
    • http://gupupokuvugal.22web.org/retadenexibisowaxuwide.pdfIn PDF document text
    • http://grenkasalo4.xyz/character_letter_template_word4y50c.pdfIn PDF document text
    • http://lotto-investclub.com/sodibesosudigifusegobix8nqxu.pdfIn PDF document text
    • http://bupatinewesep.66ghz.com/6331687808.pdfIn PDF document text
    • http://liolika-rsya.ru/gopotamatimimigumes2krp6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dalava/46667514626.pdfIn PDF document text
    • http://zotijoxamofos.epizy.com/8931737470.pdfIn PDF document text
    • http://sunapasu.epizy.com/61707899119.pdfIn PDF document text
    • http://zuraravata.epizy.com/sumokokelumaj.pdfIn PDF document text
    • http://kelopemajidimux.epizy.com/psat_practice_test_2_answers_fall_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/63763415722.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_off0000c4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F1 5448 bytes
SHA-256: 9cf18b87a381012275bf0f66e5180a4e4c4aac08a1f4948d50a6ff49e7270a30
font_01_sfnt_off0000d75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75B 10944 bytes
SHA-256: 2eedfff69617f448ed7787505e504bc455ebe6f3a8bc2bfa6bd8ed599991f622

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