Malicious PDF — malware analysis report

Static analysis result for SHA-256 d945eb086e3f77d6…

MALICIOUS

PDF

73.5 KB Created: 2021-03-03 12:30:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 4cae0838c6ea12476e7b227a506ad868 SHA-1: 37d0c8cc685724cd143d72d63f0a74f7721758c4 SHA-256: d945eb086e3f77d6a1cac1dc4128c480f699a0305e538ad3e93eee615cd76c1a
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggest the document is designed to redirect users to potentially harmful websites, possibly for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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://jottigo.ru/strik?utm_term=how+to+silence+your+microwave PDF link annotation
    • https://dilukali.weebly.com/uploads/1/3/4/5/134584555/bijoramefulesalof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367631/normal_5ff6a4860fcec.pdfIn PDF document text
    • http://cardioactiveitalia.site/16241968806o3nrx.pdfIn PDF document text
    • http://anarchymedya.com/fix_kernel32.dll_kostenlos6tmls.pdfIn PDF document text
    • http://lazirog.mywebcommunity.org/baxigaroku.pdfIn PDF document text
    • https://nafogoke.weebly.com/uploads/1/3/4/7/134776139/6343021.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449777/normal_5fccfb6349a63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461485/normal_5fdeb9a436fb9.pdfIn PDF document text
    • https://cdn.sqhk.co/walamalesumi/dZCIpcS/webuzozikuvolijebesudibuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489992/normal_60152a29638d8.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/bnKiat2/anime_girl_hd_wallpapers_apk.pdfIn PDF document text
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/fuxopuguje_tokoso.pdfIn PDF document text
    • https://puxibaso.weebly.com/uploads/1/3/0/9/130968956/pezejalume_kivulef_furaselijig_tumira.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/quantitative_research_examples_about_education.pdfIn PDF document text
    • http://vizexibidoxi.getenjoyment.net/80033846260.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473384/normal_5fcaa3506a1cd.pdfIn PDF document text
    • http://medtechnika1.ru/39878369023zscze.pdfIn PDF document text
    • http://czecheducation.space/washing_machine_door_lock_blinkingqre82.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/wizitifowubux/reporting_loan_forgiveness_to_irs.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/laguna_niguel_ymca_adventure_guides.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/zebagolexuxubovupoku.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/63733761469.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC55 5044 bytes
SHA-256: f260296e8b2a6fcfdeea53227e5f427a0eb02aaf051cf7804ae8dcfbd4782c99
font_01_sfnt_off0000dd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6D 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0000e8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CF 9724 bytes
SHA-256: 34d90c78971923adff81c34ef77eccd9e867d23548c478b2acda51a4af6c4f5a
font_03_sfnt_off00010a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378