Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cf50a09a588a6f…

MALICIOUS

PDF

73.7 KB Created: 2021-02-25 08:48:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6ed1f8ba9b2cb2d6f72d0aed8f9d126c SHA-1: 353085c72561969bc0c3f6a5e5dd17c315250525 SHA-256: 04cf50a09a588a6f4518a4ff397e90684ca4ed9b53636ef3111d5e632f3e574f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content or phishing sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a strategy of using many low-reputation domains to obscure malicious activity.

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://jacksth.ru/award?keyword=steal+this+book+abbie+hoffman+uk PDF link annotation
    • http://organicsss.space/3592395461dwfre.pdfIn PDF document text
    • http://mavurelaro.22web.org/mavokizafurubulimasol.pdfIn PDF document text
    • https://zegoliro.weebly.com/uploads/1/3/2/3/132303320/77e0a0253da.pdfIn PDF document text
    • http://betmoy54.com/segixowebatuvelaze5tpuw.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/8993786231vok1t.pdfIn PDF document text
    • http://morpeoplelife.ru/beautifulsoup_python_3._6_windowsklftq.pdfIn PDF document text
    • http://natur-green.fun/old_navy_canada_online_shoppingqqb38.pdfIn PDF document text
    • https://gofadoden.weebly.com/uploads/1/3/4/6/134615513/tezapigeduk_robuwevatek_perawasomo.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/libro_poder_de_orar_de_madrugada.pdfIn PDF document text
    • http://help-copyrightservice.xyz/14509776607xfwve.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kibiviridox.epizy.com/audio_sound_s_for_computers.pdfIn PDF document text
    • http://migukim.rf.gd/85512734577.pdfIn PDF document text
    • http://pexevogawi.epizy.com/75500035303.pdfIn PDF document text
    • http://ninonasoligu.rf.gd/19366139024.pdfIn PDF document text
    • http://debetofewozuri.epizy.com/xisizavaxelev.pdfIn PDF document text
    • http://riwesanis.epizy.com/assembly_language_programming_8086_tutorial.pdfIn PDF document text
    • http://wodagewuxaver.rf.gd/34193887858.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/what_is_the_deprivation_of_liberty_safeguards.pdfIn PDF document text
    • http://fasilew.epizy.com/45581123389.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_off0000e37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37E 5220 bytes
SHA-256: a08fe26f8609bddd4e0c3a048ab207e9c55aec46ce92cb7f57c323c365d00d00
font_01_sfnt_off0000f51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51C 10588 bytes
SHA-256: bf2880d02a8117207b2aad7d70b0276ca704e9c5b735fd18e907d154c207dc84

Open this report in the interactive analyzer, or submit your own file for analysis.