Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce8e65c79d550bb…

MALICIOUS

PDF

73.3 KB Created: 2021-03-01 20:12:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6c65ceced43e76af7618ec97c7118600 SHA-1: cc58a4b23547812956715068e4c914d12977e0c3 SHA-256: 8ce8e65c79d550bb249eb8409bbcddf10174effdc72d4821a4f0b95ca29ad78c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to deliver malicious payloads or redirect to phishing sites.

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://ponafet.ru/123?utm_term=nitecore+d2+charger+settings PDF link annotation
    • http://wapadax.scienceontheweb.net/wigizisobunasaxerozebo.pdfIn PDF document text
    • https://devonejejarib.weebly.com/uploads/1/3/4/6/134608322/c95202f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378834/normal_5feb7ebcdf1ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405907/normal_6015e26912f60.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/uc_riverside_sat_scores_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480743/normal_5fe4fb9f2948d.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/3932730283.pdfIn PDF document text
    • https://tizitumobupo.weebly.com/uploads/1/3/4/9/134904485/neneto-lanigesibipit.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/46115066858.pdfIn PDF document text
    • http://dommasters.site/what_do_you_mean_by_desktopyir3j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456985/normal_6020ae982c21f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420451/normal_5fce1dc9989c8.pdfIn PDF document text
    • http://dajexori.mypressonline.com/48968294548.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/ab14b0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457843/normal_600c4f798ca14.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/ti-34_multiview_calculator_online_use.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/razor_power_core_e200_weight_limit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500453/normal_5fe617a928523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388157/normal_5fd7ed2ec9032.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000df03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF03 5272 bytes
SHA-256: a52c39f99e64200cdcc1c93e3a00836525a0c0e81dbe57ad96ac32e898a58033
font_01_sfnt_off0000f0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EE 11448 bytes
SHA-256: 28ecbd142fcdcd5b37e19532a4154c6b7577e5eb221889a93be15f805718ed90

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