Malicious PDF — malware analysis report

Static analysis result for SHA-256 a784713f52ed88a2…

MALICIOUS

PDF

83.0 KB Created: 2021-03-03 23:14:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5a05d81c0de12d663650cdb348f20cb6 SHA-1: 227fd7cc91dde9beddeb03eba7d726a36e8e6a34 SHA-256: a784713f52ed88a2e6f3fc3fc4ccb2d17656180244af89dcc623d6a652fe2fd0
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting it functions as a link farm or phishing lure. The presence of 'utm_term' in one of the URLs further supports a phishing or malicious redirection scheme.

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://xajibur.ru/strik?utm_term=the+real+book+of+enoch+pdf PDF link annotation
    • http://myirn.icu/gtn_650xi_pricefecnw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407576/normal_601214e821162.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/70969973431.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383160/normal_60044e59b247b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401505/normal_5fd8b8bc3612d.pdfIn PDF document text
    • http://lisifakus.66ghz.com/basimirisezuwisegojewaje.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/constitucion_poltica_estados_unidos_mexicanos_1857.pdfIn PDF document text
    • http://bcipreactivaperu.com/robert_collier_booksrs6gz.pdfIn PDF document text
    • http://yoganchik.space/vovikedifesupaxapipivutpsrgr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_601b925f90941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417205/normal_60113bde32a98.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
    • http://bagozorox.rf.gd/cctv_lens_calculator_apk.pdfIn PDF document text
    • http://wirirarosutuki.epizy.com/a_christmas_prince_2017_online_sa_prevodom_na_srpski.pdfIn PDF document text
    • http://vemoketir.rf.gd/dokejufirol.pdfIn PDF document text
    • http://lutaretubonen.rf.gd/galore.pdfIn PDF document text
    • http://gafodix.myartsonline.com/how_to_get_free_champions_in_marvel_contest_of_champions.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_off0000fae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE5 4880 bytes
SHA-256: 126bca961afcec3a9ed820cd196dabfdfe9cc4ab3899fc602c0754f0bbc55bf5
font_01_sfnt_off00010b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B60 11032 bytes
SHA-256: ff2efedf3ea4b39f94e02c8e4ec5a6e19d555bd6cad515545acf8479d6806a9f
font_02_sfnt_off00013118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13118 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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