Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8acfa24a5ee3167…

MALICIOUS

PDF

72.1 KB Created: 2021-03-25 03:04:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d4c5a834e5e393568f511866e7a30a9f SHA-1: 14fe2db5c2c2fd2be8dfa40bf30981b2252fb4b5 SHA-256: c8acfa24a5ee3167ad4c614bdf31e0e33820b30acd3ecd870a2eabd6b0cbbe5a
124 Risk Score

Malware Insights

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

The PDF contains embedded URLs that lead to suspicious domains, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8215

Heuristics 4

  • 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
  • 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://bologen.ru/award?keyword=apec+summit+2020+pdf PDF link annotation
    • http://tabagobadirab.iblogger.org/mebuxagumato.pdfIn PDF document text
    • http://buwovavozu.getenjoyment.net/kovatumidax.pdfIn PDF document text
    • http://gokawojop.scienceontheweb.net/24782621936.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/ihHHgi8/27019291945.pdfIn PDF document text
    • https://cdn.sqhk.co/bamikalagov/6ggi9ge/t_mobile_login_pay.pdfIn PDF document text
    • http://fikakutipid.mygamesonline.org/berenodisuzonewotitasov.pdfIn PDF document text
    • http://roworesezakor.iblogger.org/marshall_rosenberg_nonviolent_communication_quotes.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/60c72c2e-cedd-4ec2-9479-dc365acfc094/xanathars_guide_to_everything_racial_feats.pdfIn PDF document text
    • http://gixiluvigatekij.atwebpages.com/interior_design_sales_jobs_chicago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3177ac37-9f0b-45a9-acef-b1250faf6b0c/zazutorugovuwaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65935cb1-660f-4cc3-809f-4475cfddd9f8/giwupaxawupiwitelelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1268c4aa-ff96-47c4-9b2a-65f8fd2c7e73/sonimegugaxiwused.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1bf5778-68da-47f2-84da-519df16a3d23/can_i_get_my_w2_online_from_kroger.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/87079507409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17835ee3-095e-4d1a-b842-9893e573f445/sasuvomufawelonenabajil.pdfIn PDF document text
    • http://pidosowot.epizy.com/delonghi_lattissima_plus_espresso_machine_black.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/the_ed_schein_corporate_culture_survival_guide.pdfIn PDF document text
    • http://revifobatuge.rf.gd/toastmasters_general_evaluator_report_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/advanced_typescript.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6A 5228 bytes
SHA-256: e71dd9e79e8fba1d100fb9c037e6f7596800647db984adb0dd665aaae05d9368

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