Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8cdfc71b5a70562…

MALICIOUS

PDF

73.8 KB Created: 2021-02-27 22:37:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 38e6b6d9f7ae9461bcfb279757b10f7d SHA-1: 5e33e85d4de916d8f17f42522d19d731bc3385ef SHA-256: e8cdfc71b5a70562bfbcacb299c6eb128a4d9cb00e15b39d920a5325cb4098e1
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to PDF creation and a search term, indicating a lure to disguise the malicious intent.

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://jacksth.ru/aws?utm_term=pearson+envision+algebra+1+textbook+pdf PDF link annotation
    • https://telavepifamika.weebly.com/uploads/1/3/4/3/134352802/6668954.pdfIn PDF document text
    • http://fefikaniki.22web.org/84567133069.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/facebook_device_code_login.pdfIn PDF document text
    • http://tiwirodizefa.iblogger.org/cnc_cad_cam_software_free.pdfIn PDF document text
    • http://tuwavetatifida.iblogger.org/38228340942.pdfIn PDF document text
    • https://lokanasa.weebly.com/uploads/1/3/5/2/135299929/9519109.pdfIn PDF document text
    • https://gupekuvexo.weebly.com/uploads/1/3/4/6/134610658/1134165.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/java_functional_programming_tutorial.pdfIn PDF document text
    • https://rasozonikazip.weebly.com/uploads/1/3/4/9/134904665/sudovilarokefu.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/ijgfdje/57515719644.pdfIn PDF document text
    • https://gutoserenenew.weebly.com/uploads/1/3/2/6/132681448/5165261.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kotiximuro.rf.gd/sudabutenubati.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/desagimorovuvedekimexo.pdfIn PDF document text
    • http://vakebajenom.epizy.com/chelsea_derby_match_report.pdfIn PDF document text
    • http://fobapisarut.epizy.com/faded_violin_sheet_music_easy.pdfIn PDF document text
    • http://dofomexikokubeb.epizy.com/kabazejakuzolilajafir.pdfIn PDF document text
    • http://mubufelijora.epizy.com/77656369606.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_off0000e0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C8 5592 bytes
SHA-256: acd280f83cafbff2535df3a2b9c8a80682d638b910b4a2f105f7bebc7f2acbe6
font_01_sfnt_off0000f3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E6 11496 bytes
SHA-256: 452d9ac633f5ee2131ec4c5864809fdebad351c7b6076e1c7343017514281349

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