Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7cc359ffdf43c3…

MALICIOUS

PDF

76.8 KB Created: 2021-03-14 16:05:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e75c0f21642c72963b58e5982d3283dc SHA-1: d0a1f284752add05da7ee8d1e202bcb4b9ef494d SHA-256: dd7cc359ffdf43c38cd3893d309a4b8bc9438895b10c1a12581e9ce98cc0e7c0
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains an embedded URI pointing to 'https://soxebez.ru/award?keyword=procalcitonina+valores+normales+pdf', suggesting a phishing or credential harvesting attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall evidence points to a malicious PDF designed to redirect users to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/award?keyword=procalcitonina+valores+normales+pdf
    • https://cdn-cms.f-static.net/uploads/4415051/normal_5fe929eb75dd4.pdf
    • https://cdn-cms.f-static.net/uploads/4420250/normal_6016444a11338.pdf
    • https://static.s123-cdn-static.com/uploads/4490534/normal_5fcd6543dee7d.pdf
    • http://lozosomegav.iblogger.org/what_is_computer_network_and_its_types.pdf
    • http://fomoregekamikat.mypressonline.com/english_dictionary_free_download_full_version.pdf
    • https://cdn-cms.f-static.net/uploads/4426090/normal_6034c8fc6d4f6.pdf
    • https://static.s123-cdn-static.com/uploads/4389801/normal_5ff16b0623169.pdf
    • http://tokexal.medianewsonline.com/complex_analysis_mcq_questions_and_answers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_d0872caf461a471b960a55248e16f376.pdf?index=true
    • http://wokidomogu.onlinewebshop.net/boticario_catalogo.pdf
    • https://s3.amazonaws.com/goneduzum/bulletin_de_paie_maroc_excel.pdf
    • https://0926596c-b1e6-4473-87d6-fed2e709bfeb.filesusr.com/ugd/e2a635_be4a44d6dc494ecd9982a2fb793491ab.pdf?index=true
    • http://wonetone.rf.gd/givupifidobatutobefotab.pdf
    • https://76b44699-1094-4fd8-8d4a-70b7be8159c3.filesusr.com/ugd/c450b2_4532fb6025524589a394f3d2b93c57d1.pdf?index=true
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_3a04636e4211479d81ac92a57cbe1991.pdf?index=true
    • http://rixibedi.onlinewebshop.net/dell_precision_m4600_ram_upgrade.pdf
    • http://nojozorupugi.epizy.com/90114714949.pdf
    • https://s3.amazonaws.com/wemofodi/476428392.pdf
    • http://kagijido.myartsonline.com/the_long_winters_the_commander_thinks_aloud_lyrics.pdf
    • https://s3.amazonaws.com/jixerubowi/lord_of_the_flies_chapter_1_3_study_questions_answers.pdf
    • https://s3.amazonaws.com/kodipopujufipig/hutchinson_mn_police_report.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eac5.bin
124adb6ab0185901514dcce92faa70a38532454f1a21ca5e9052f69b3318705c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC5 5364 bytes
font_01_sfnt_off0000fcf3.bin
9b79ea3441b8097b73f92597ae1a148dec5f9ab650bd1e8642a93f66bf4d50c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF3 12104 bytes

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