Malicious PDF — malware analysis report

Static analysis result for SHA-256 980a477eef641d30…

MALICIOUS

PDF

86.8 KB Created: 2021-04-20 11:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: eadc548630b6e69b5548bc102d38ddff SHA-1: ce3c30d8f67eb8566981cab83e5cd03567128097 SHA-256: 980a477eef641d3054952c4f52524c49da93e82e29fcc1ebf25dba8734d7e6d2
186 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The primary URL, https://midufefew.ru/strik?utm_term=how+to+read+check+engine+light+codes, is presented as a guide but likely leads to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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://midufefew.ru/strik?utm_term=how+to+read+check+engine+light+codes PDF link annotation
    • https://nesibebinirudeb.weebly.com/uploads/1/3/5/3/135311353/4130f62c15f.pdfIn PDF document text
    • https://borikalubir.weebly.com/uploads/1/3/2/6/132681749/1190429.pdfIn PDF document text
    • https://napuvenorabinu.weebly.com/uploads/1/3/4/4/134490891/6a6c9695f52f.pdfIn PDF document text
    • https://cdn.sqhk.co/basinasedu/aKJcPMF/minecraft_windows_10_edition_mod_packs.pdfIn PDF document text
    • https://renunuvejo.weebly.com/uploads/1/3/4/7/134710344/812c8ae3a.pdfIn PDF document text
    • https://segagewemavovus.weebly.com/uploads/1/3/0/8/130874565/dd89c34e5.pdfIn PDF document text
    • https://cdn.sqhk.co/mewowoji/CkkkXgh/selojejob.pdfIn PDF document text
    • https://toxupenowa.weebly.com/uploads/1/3/4/0/134042648/8780206.pdfIn PDF document text
    • https://cdn.sqhk.co/fezifenax/ihgPhg3/lovevufimifusu.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/wgd7ZJB/fish_live_wallpaper_app.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/ifgfJ6n/world_s_first_rotating_skyscraper_in_dubai.pdfIn PDF document text
    • https://jojonawizofobu.weebly.com/uploads/1/3/1/4/131438175/768c50f717e46.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_d2f447162f6d4e539a739ba47eedcafb.pdf?index=trueIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_8fae6da07d184506b9101b4688c7d3be.pdf?index=trueIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_00824d08d40b4cb1948a1eec25eeacb0.pdf?index=trueIn PDF document text
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_f199d152d72042259251e216a877db9b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vipinib/getting_to_know_arcgis_desktop_5th_edition_esri.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/amplificador_de_audio_casero_super_potente.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/5733072257.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/85843866791.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/31789064972.pdfIn PDF document text
    • https://3f3b26af-a357-4ab7-b723-baa2d0f6bb2b.filesusr.com/ugd/5d6e2e_e2428b1a8e7643d8b1836d7d529d06c6.pdf?index=trueIn PDF document text
    • https://bea00909-aa88-4d38-ac88-e56db460b486.filesusr.com/ugd/923104_820b5237e13e4d0da6cd51a14dddee04.pdf?index=trueIn 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_off00011554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11554 5320 bytes
SHA-256: dec4cca9db9cf7ac0a18a1f8bdce34d28a6a0f3729bd0129837cd2f5ae68c434
font_01_sfnt_off00012774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12774 11152 bytes
SHA-256: 04d7f3bee7269efb65d8dd51c485b2233dd7fde5b07908bc8b83f9c5d8e353bf