Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd34da097ae014f…

MALICIOUS

PDF

131.9 KB Created: 2021-05-23 09:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c12ddbc4f7bbc1c39da47a2f502e7381 SHA-1: 117743e6928b095bf1a87f47b171cda25764a4fa SHA-256: fdd34da097ae014f57c357f97bc2678acc7ccffbf7c4766e7fdce2d47c877e58
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/strik?utm_term=what+does+age+60+signify PDF link annotation
    • https://vuminuzatadabem.weebly.com/uploads/1/3/4/3/134311796/zebigu_rejepanisivedok_satikuduxurefo_gonomujug.pdfIn PDF document text
    • https://lokejefu.weebly.com/uploads/1/3/5/3/135301848/kejokuguvunanipi.pdfIn PDF document text
    • https://kibixaxetoro.weebly.com/uploads/1/3/4/8/134861284/90a56269576a05.pdfIn PDF document text
    • https://vajefusuvujob.weebly.com/uploads/1/3/4/4/134464162/sevebujado_loxalaminor.pdfIn PDF document text
    • https://jazawimap.weebly.com/uploads/1/3/5/3/135346256/buwakakiku-warumufex.pdfIn PDF document text
    • https://zefukigu.weebly.com/uploads/1/3/4/7/134718507/gapakokupadirawinow.pdfIn PDF document text
    • https://nesotufofiwin.weebly.com/uploads/1/3/1/3/131381712/gexegaluxewovu-toweporarimo.pdfIn PDF document text
    • https://solujasamaro.weebly.com/uploads/1/3/4/6/134695729/8500343.pdfIn PDF document text
    • https://jigebizelu.weebly.com/uploads/1/3/1/4/131438259/f8df21.pdfIn PDF document text
    • https://mogogumabes.weebly.com/uploads/1/3/4/9/134900096/535145548fcaa95.pdfIn PDF document text
    • https://namonivet.weebly.com/uploads/1/3/4/4/134493383/d61cb61aee0.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/falejogajir/97622235457.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/kigujeluxowokimabetisoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/baixar_jogos_gratis_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/86814337810.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/wordpress_all_plugins_list.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/tajofobikapefisirofo.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/lamuxegiduzanolasan.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/kyle_photoshop_brushes_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/constitutional_convention_conflicts_and_compromises_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/blueprint_medicine_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/fuzerajolofuzisimag.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/nalovigafafim.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/spider_man_noir_cosplay_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/canon_dslr_photography_tutorials.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/45333979210.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_off0001ca4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA4D 5452 bytes
SHA-256: 6910b37591f381af239e2a033fc76ecaeae263fa9aceecd39da738a44d30a65a
font_01_sfnt_off0001dcee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCEE 10684 bytes
SHA-256: bc8d19a5bd5cf67ce6e9b2af209f44fc6073a795ecd46b8bc1a37ae850728058

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