Malicious PDF — malware analysis report

Static analysis result for SHA-256 051756043204cdc6…

MALICIOUS

PDF

75.8 KB Created: 2021-03-25 10:17:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 70ce195b4838489f8dcbe8a3a3070740 SHA-1: d409ed43b83ae343251bce94fe04d87a34bb36e6 SHA-256: 051756043204cdc6226eb0ee8369a87fd65478d1b1891725bb92397933424672
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/wix?keyword=java+lake+ny+weather PDF link annotation
    • https://janodapos.weebly.com/uploads/1/3/1/6/131636969/41699.pdfIn PDF document text
    • http://idealica-italiaufficiale.website/sibikupimukulelapnu0h.pdfIn PDF document text
    • http://tomandbxof.site/22094045645fq3yh.pdfIn PDF document text
    • http://triple-doska3.club/bassett_crib_instructions94h2s.pdfIn PDF document text
    • http://azakalaza5.xyz/835619758365mynf.pdfIn PDF document text
    • http://artyom.guru/english_101_course_numberc1t9g.pdfIn PDF document text
    • http://steblin.pro/logitech_z_5300_control_podkkfgd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500878/normal_5ffd5de68f47a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406191/normal_6052ed2f35828.pdfIn PDF document text
    • http://leftoutclub.com/miriwamuzigel5618.pdfIn PDF document text
    • https://xidumalebuwun.weebly.com/uploads/1/3/4/8/134894794/nalutatuz.pdfIn PDF document text
    • http://lorenbayi.com/18314537989yhs2n.pdfIn PDF document text
    • http://1green.space/xadexixivudepakafipaajwx0.pdfIn PDF document text
    • https://xaxexuwolak.weebly.com/uploads/1/3/5/9/135978614/4b2b0c47ecce.pdfIn PDF document text
    • http://tekdouche.xyz/waltz_in_e_minor_carulli_sheet_musica512c.pdfIn PDF document text
    • http://cheatyou.site/adverse_reaction_reporting_guidancek550v.pdfIn PDF document text
    • https://karegito.weebly.com/uploads/1/3/4/6/134626514/4678335.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeeb09b2-c6f1-4adb-bf7d-dd1d9e31acd3/30943778255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c1bc83e-0aad-40fa-aed0-3f58623dcfb6/lilopepizivonilep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/330e2ab2-143c-49a7-8663-8a7a3815b12c/what_is_psychology_of_religion_definition.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD2 4904 bytes
SHA-256: c7e324d3f7c85f79d1f0980d6752c8d202ee6473bc538eb101770cbd7c86489f
font_01_sfnt_off0000fc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC94 11104 bytes
SHA-256: 0e44d356966220e61a03bb31d445a745f396fbcaa1697944367b6d7ed611db63

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