Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fac6fa0d78eaabe…

MALICIOUS

PDF

97.3 KB Created: 2021-02-18 06:04:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1413847a293e40d137ca83dce686d703 SHA-1: 0c0ccee8b8d9328d3d35838430c0de539b703de2 SHA-256: 6fac6fa0d78eaabe7bd6fe8f8faa6b9efd1ee00bf435eb328175b4e23ef1d0fd
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to direct users to potentially malicious websites. The ClamAV detection and ML classifier further indicate malicious intent, specifically flagging it as a phishing trojan. While no scripts were directly extracted, the presence of numerous external URLs points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://bologen.ru/strik?utm_term=us+military+phonetic+spelling+alphabet PDF link annotation
    • https://cdn.sqhk.co/rivitovolu/iFhfzgg/online_games_snow_bros_2_kbh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475217/normal_60163c1e8ff31.pdfIn PDF document text
    • http://uose.xyz/what_is_the_main_difference_between_the_new_and_old_testament4p5xz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384154/normal_5ff780048f500.pdfIn PDF document text
    • http://ig-copyrightnotice.com/lara_croft_relic_run_mod_apk_obbbti8h.pdfIn PDF document text
    • http://fastpysystem.online/88062347081que9q.pdfIn PDF document text
    • https://wipabobape.weebly.com/uploads/1/3/5/9/135985954/gemopi.pdfIn PDF document text
    • https://cdn.sqhk.co/fusexabuvej/A4ijoih/niwonotoku.pdfIn PDF document text
    • https://cdn.sqhk.co/mujejadalale/YijdkgJ/neighborhood_market_springfield_mo.pdfIn PDF document text
    • http://teaapple.space/microcontroller_based_fire_fighting_robotqt4xl.pdfIn PDF document text
    • https://vinofuloro.weebly.com/uploads/1/3/4/8/134850824/murivisawa_tovonipopaman_xudonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_6027a8e7c35ee.pdfIn PDF document text
    • https://pofitefe.weebly.com/uploads/1/3/4/6/134617546/gazopofeju_sezogogudirapi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473419/normal_5fff6c6e28e50.pdfIn PDF document text
    • https://wuwabisa.weebly.com/uploads/1/3/1/6/131606234/2f054d90ad5e56.pdfIn PDF document text
    • https://cdn.sqhk.co/dibadigodem/iemFXge/34890123828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483082/normal_6027fda8e6615.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sobaketemu/unseen_comprehension_worksheets_for_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/givirelivuviledi.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/cycling_computer_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/excel_formule_arrondi_au_multiple.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/ariana_grande_thank_you_next_live_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/assets_folder_in_android.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/google_web_fonts_api_stylesheet_link.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D99 5368 bytes
SHA-256: a526b3f23b23068e80bfb3e5795f7820a2fb30d4f80cfca3486d8ff4854863a9
font_01_sfnt_off00011fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAE 17372 bytes
SHA-256: 5a7f07fe237fd220432996f2e2a3bc53776ba3e1d5036c58bb0bb1572c0d3a1c
font_02_sfnt_off000153ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153AB 16180 bytes
SHA-256: 839525a4cafb61725c6f706b7ec232a31587457b958f9446701d8799e6506c3a
font_03_sfnt_off000168db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168DB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361