Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14cab9a4827842a…

MALICIOUS

PDF

80.2 KB Created: 2021-03-28 04:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 76355fd8c74777f96a9d807a1106e2b2 SHA-1: 0638464cfa137b0eb7a33f92eb1dc4e8f9d18df8 SHA-256: d14cab9a4827842ac9bd20fefb9a1f0ea51b7c47e53515673498b30cbdb4e390
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, with one specifically identified as part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of external URIs and the link farm heuristic strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=kaer+maga+city+of+strangers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369782/normal_60243c738e640.pdfIn PDF document text
    • http://keto-menu.online/91449343387v3ye7.pdfIn PDF document text
    • https://rajevolid.weebly.com/uploads/1/3/0/8/130813967/c22417675.pdfIn PDF document text
    • https://jasasenud.weebly.com/uploads/1/3/4/1/134131975/lifisavupa-giroponijutama.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445754/normal_604500b0d53c6.pdfIn PDF document text
    • http://newyearshop.site/petipubigofecs7kx.pdfIn PDF document text
    • https://sarajigirokoxi.weebly.com/uploads/1/3/5/3/135300612/3322471.pdfIn PDF document text
    • https://zefipoxiba.weebly.com/uploads/1/3/2/6/132681281/8161116.pdfIn PDF document text
    • http://fugilugidijud.22web.org/vekulotax.pdfIn PDF document text
    • http://alsamcctv.com/kejepubujiwuwaktely.pdfIn PDF document text
    • http://muvezada.iblogger.org/750531123.pdfIn PDF document text
    • https://sumijiluwovoj.weebly.com/uploads/1/3/4/2/134266387/6d299e5da3.pdfIn PDF document text
    • https://fetevosave.weebly.com/uploads/1/3/1/4/131438058/popamoxisopowu.pdfIn PDF document text
    • http://fitnesspack.net/2008_dodge_avenger_rt_horsepower8om6v.pdfIn PDF document text
    • https://rimofemosi.weebly.com/uploads/1/3/4/3/134351632/muwixakejozidit-musiburunur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417519/normal_605a41144ae74.pdfIn PDF document text
    • http://belplitka.ru/badonut4gc0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tifijawubizomed.epizy.com/google_sheets_count_if_contains_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a38499dc-9b38-4607-9f08-6adc2d1fc1bd/wewuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd401c4b-2ffa-447e-8b0f-abbb46b2a4dd/13917347472.pdfIn PDF document text
    • http://ketaxesam.epizy.com/georgia_immunization_form_for_school.pdfIn PDF document text
    • http://golemibafub.epizy.com/what_is_general_to_specific.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_off0000fd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7C 5240 bytes
SHA-256: 8473c5e528f2c522ebd499d6fc1d52e0b2eef80790f7d60babaaf1b791414d68
font_01_sfnt_off00010f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F50 10524 bytes
SHA-256: ec43c02fa12099ebfe321418497cf47f3806b32ac8d984a8ef8d7d789656bad4

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