Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc8f339cf89b97c…

MALICIOUS

PDF

80.7 KB Created: 2021-04-11 00:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0b1fa2646fe077f8055468ef50f363a1 SHA-1: aed3659adc103e2e34e70e97f22ee5fa82399a1d SHA-256: 5cc8f339cf89b97c039a38b744a1b47f8514db11092ca0e524fcf45b782e6dd0
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 ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable hosting and employing UTM parameters, indicating a link farm designed to redirect users. The presence of external URIs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://resalured.ru/strik?utm_term=line+6+spider+3+150w PDF link annotation
    • http://xebubux.sportsontheweb.net/amplidyne_and_metadyne.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_601fd8c1a5d2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459323/normal_60603e773a9cd.pdfIn PDF document text
    • http://penageli.getenjoyment.net/dorijavaler.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378606/normal_60464569a7710.pdfIn PDF document text
    • http://gaduvokine.iblogger.org/zebra_gk420d_technical_manual.pdfIn PDF document text
    • http://wudaxozibutix.sportsontheweb.net/define_bureaucracy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413842/normal_6006e9f596c25.pdfIn PDF document text
    • http://xazowagef.mypressonline.com/bessel_differential_equation_solution.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/bodunufoguliv.pdfIn PDF document text
    • http://nujevujem.22web.org/bibliografia_apa_de.pdfIn PDF document text
    • http://sejujanovemo.medianewsonline.com/berserk_of_gluttony_novel_indonesia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_603d0fd54243a.pdfIn PDF document text
    • http://narixuz.mypressonline.com/25434551747.pdfIn PDF document text
    • http://tizeteleke.22web.org/gratuity_act_1972_in_marathi.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/fibugonogu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/twilight_part_5_full_movie_in_hindi_download_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/camp_transformation_carson_ca.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/c_access_enum_in_template_class.pdfIn PDF document text
    • http://xawabaxazulaga.epizy.com/circe_slab_b_font_free.pdfIn PDF document text
    • http://xirofapinowud.atwebpages.com/tegejif.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/como_perder_barriga_em_1_semana_com_exercicios.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/cadence_music_theory.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_off0000f906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF906 5380 bytes
SHA-256: ba8472fc21f061e818ac10e6cf3dd4f41612dead3d6c93e2cc15ce2c3ef9dd99
font_01_sfnt_off00010b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7F 12000 bytes
SHA-256: c6fa088f354dfad5912fb60d183075e7d5132f71586ae0a7a4654fc0024ab8fb

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