Malicious PDF — malware analysis report

Static analysis result for SHA-256 d92a003002800575…

MALICIOUS

PDF

70.5 KB Created: 2021-02-20 02:18:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6ad746688c298e465f50170ac75e8fc7 SHA-1: 62c8b0a3995089cf9a5303ddffc753ed2dae0bdc SHA-256: d92a003002800575d391e08d3ad93393d90a2fb8649f1802de9305fbe9ab4b20
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wb?keyword=vista%20128%20programming%20software PDF link annotation
    • http://usersonlineguardingsettings.site/5286432078wbpkh.pdfIn PDF document text
    • http://teachost.com/mupirocina_isdin_20_mg_g_pomada3egkd.pdfIn PDF document text
    • https://puroporutenes.weebly.com/uploads/1/3/1/6/131606954/kamavomewujabo.pdfIn PDF document text
    • https://xitozenajoxoge.weebly.com/uploads/1/3/2/6/132681812/nijusadama.pdfIn PDF document text
    • https://vizexetu.weebly.com/uploads/1/3/4/8/134864552/labezuna.pdfIn PDF document text
    • http://datingsexchat.site/fitiguxavotamezuxag65u3.pdfIn PDF document text
    • https://tikobivit.weebly.com/uploads/1/3/1/3/131382680/zesivoxaj.pdfIn PDF document text
    • http://mylic.ru/snark_hz-1_tuner_review6wnbg.pdfIn PDF document text
    • https://nawobelif.weebly.com/uploads/1/3/5/3/135307193/sajovulavusu.pdfIn PDF document text
    • http://khareedforosh.com/jesus_calling_january_8cwxfp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nivunurawusaxo.rf.gd/mawlid_barzanji_arabic.pdfIn PDF document text
    • http://giduzorim.epizy.com/captioned_performance_theatre_royal_plymouth.pdfIn PDF document text
    • http://lalexipitu.rf.gd/contaminacion_ambiental_ensayo.pdfIn PDF document text
    • http://waxodomopupu.epizy.com/3893484684.pdfIn PDF document text
    • http://leruxesotagas.rf.gd/57872675427.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/kejemozuzirinozowozoruni.pdfIn PDF document text
    • http://fejiremow.epizy.com/asdf_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/japan_guide_hokkaido_car.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/tratamiento_de_anemia_en_embarazo.pdfIn PDF document text
    • http://lozopavo.rf.gd/lulemaxilaxim.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/breadman_plus_tr_810_manual.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_off0000d499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD499 5624 bytes
SHA-256: 2d9fabdc23c5cffd0e043f3df925ae71fcb2f23209378f0b6e2ffbfe1ea173af
font_01_sfnt_off0000e7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C2 10816 bytes
SHA-256: d567930f43346b7b9fc06876011939f4e27756106846195e7567ef41d6fe2825

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