Malicious PDF — malware analysis report

Static analysis result for SHA-256 3403c5568cf3cada…

MALICIOUS

PDF

67.6 KB Created: 2021-02-19 21:39:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 118be40a6d9b18ff4b8cc2d321544452 SHA-1: 94d91d427d7f2e2f97ea2dcb9dba8d54e8193233 SHA-256: 3403c5568cf3cada2cd221df49043db6924b860a430befd2edf66ff67dc05dfc
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to legal materials, further supporting a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=problems+in+contract+law+cases+and+materials+8th+edition+pdf PDF link annotation
    • https://rokozozo.weebly.com/uploads/1/3/4/4/134498035/366533e.pdfIn PDF document text
    • https://mojebope.weebly.com/uploads/1/3/4/6/134609081/438988e.pdfIn PDF document text
    • http://flowerport.market/wetebixanulotorogilomejel7r3mr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445130/normal_5fc8d5f77cb5f.pdfIn PDF document text
    • http://cybety.xyz/black_and_decker_coffee_machine_manualp7j4o.pdfIn PDF document text
    • https://jeripakituwimug.weebly.com/uploads/1/3/2/6/132695489/fajepu_nujavivo_bobudano.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412388/normal_5fc7b94917684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454172/normal_5fe699a46e9de.pdfIn PDF document text
    • https://dobibumalo.weebly.com/uploads/1/3/1/0/131070161/beforix.pdfIn PDF document text
    • http://stingeksoj.online/dewezozagosugumefajoji6i1m7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_60193921c9a41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sijopar.epizy.com/likagotodonodajakusebovap.pdfIn PDF document text
    • http://budaboz.epizy.com/letter_writing_in_marathi_informal_new_format.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_off0000c8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F6 5820 bytes
SHA-256: 6125af699b7edb8f8b68d7fb4109fcda85b19979d591fecfd1d0a706d86b3924
font_01_sfnt_off0000dcaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAA 10700 bytes
SHA-256: c7fbad2034a8227f4bed208a13cc4ab75ab91102b9e6992031c94a09bc1014ef

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