Malicious PDF — malware analysis report

Static analysis result for SHA-256 00979b91eda800b5…

MALICIOUS

PDF

75.4 KB Created: 2021-05-17 10:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2b7127869c1dc1b03370e7556d16735f SHA-1: b27aac6083e6f7fcfe0b1b93908bc657ef8673e0 SHA-256: 00979b91eda800b5509d259b3d66b0840eaed58cbecf7c393faa72f18b7a3ba0
186 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 0.9996

Heuristics 6

  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=descargar+biblia+reina+valera+1960+con+audio+gratis PDF link annotation
    • https://cdn.sqhk.co/vipikunowi/lijlpVx/genologupozujenuwofolusil.pdfIn PDF document text
    • http://madusotiju.22web.org/octonauts_creature_report_lion_mane_jellyfish.pdfIn PDF document text
    • https://pulisojoperun.weebly.com/uploads/1/3/4/4/134487891/1569148.pdfIn PDF document text
    • http://xedekozis.22web.org/bentham_utilitarianism.pdfIn PDF document text
    • https://cdn.sqhk.co/xumirikebixo/b7ijsic/1009824163.pdfIn PDF document text
    • https://balixilime.weebly.com/uploads/1/3/1/3/131398392/duxileminugixi.pdfIn PDF document text
    • https://cdn.sqhk.co/vezubusevof/1gihaW7/nurilatanisozapavaji.pdfIn PDF document text
    • https://majosipodolonax.weebly.com/uploads/1/3/0/8/130814003/379915.pdfIn PDF document text
    • https://cdn.sqhk.co/xobevopu/hjhM9hi/how_to_do_cnc_programming.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/ldc_answer_key_2020_12_august.pdfIn PDF document text
    • https://cdn.sqhk.co/rutunidosaw/cu0jb1O/mcintosh_labs_mt1100_integrated_turntable.pdfIn PDF document text
    • https://cdn.sqhk.co/soletibedix/IJyhefJ/dibuteli.pdfIn PDF document text
    • https://gazuxupoje.weebly.com/uploads/1/3/4/1/134108966/b4cd3cd3f332c38.pdfIn PDF document text
    • http://tedurelaseji.mygamesonline.org/vifoxu.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/IZOlifv/lil_alchemist_best_gold_combo_cards.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/99545469747.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/directv_hr24_500_wont_connect_to_internet.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/7jimdvm/gokorinifawawipiwir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://javunaxonifuz.rf.gd/25925029342.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/pdf_split_and_merge_basic_2._2_4_free_download.pdfIn PDF document text
    • http://wafogaz.rf.gd/52799012033.pdfIn PDF document text
    • http://vokotikif.epizy.com/analytical_reasoning_mcqs_with_answers.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_off0000e5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E0 5808 bytes
SHA-256: 79f54f0cfabf8477cfd2e461a90dfd9cefce614858e9b2cdc369225b82c4d530
font_01_sfnt_off0000f9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BD 11824 bytes
SHA-256: b201ffa44567553864292a496949665c619220f866f4ee98a634dfd29a5f8670