Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad65d8bd18b7402…

MALICIOUS

PDF

85.2 KB Created: 2020-12-25 19:21:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9e5bd63c61922b10bdc76f5a7e216ef7 SHA-1: 9bd1cbec52aee75f6917d6219415c42ee4db6f34 SHA-256: 4ad65d8bd18b74020e87a7f05a72c7df9762a73ce8312325132f50860239247b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing unwanted content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious or spammy websites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafficel.ru/strik?utm_term=rexville+ny+land+for+sale PDF link annotation
    • https://cdn.sqhk.co/podizapexiv/i8jiia1/telemedicine_companies_in_europe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421461/normal_5fc91d5a2d5c2.pdfIn PDF document text
    • https://kepijiloxa.weebly.com/uploads/1/3/4/1/134108658/dcc559d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5fa1a286db1f2.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/gicvidk/57244042888.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/6dc3b3ec-429f-453b-b64c-84b3d4f39aaf/diversity_consciousness_4th_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9283a7a-cd47-4cca-a487-d6342c0fcb77/helping_verbs_list_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/ludovico_einaudi_nuvole_bianche_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/turiyatita_upanishad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b322cae8-623c-4b03-9aec-8ddf376ff318/vocabulary_workshop_level_g_unit_6_completing_the_sentence_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/nenobawezevowegab.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/77477726508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72d8341-2394-455c-b631-22a4526e5165/probability_word_problems_worksheet_1.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 1

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_off00010f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4D 5136 bytes
SHA-256: fc051c8255a66a2db300e52363fc057c94268ddfa076070a834765e6ac27adec
font_01_sfnt_off000120ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120EC 11488 bytes
SHA-256: ebba1b94a345b643f314a8da29cd447379f2c18c5069aa7a376801bd912d6e08

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