Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb69cb91149c93fd…

MALICIOUS

PDF

57.2 KB Created: 2021-03-30 09:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fb06d45792e82af64aba29493e7e17b3 SHA-1: f1ea8b14cdacbae207cb86569383ebfff73261d0 SHA-256: fb69cb91149c93fd1a5e9e52e2124aa497772d125aaeadc8679c0601768a58d1
224 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of 'LOLBin token sequence in document text' suggests potential execution of commands or exploitation, possibly via embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6555

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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
  • 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://dugedepap.ru/award?keyword=cavum+oris+pdf PDF link annotation
    • https://cdn.sqhk.co/xawobovuji/Zjbjh62/beard_grooming_kit_amazon.pdfIn PDF document text
    • http://zebozewazogaso.scienceontheweb.net/how_to_calculate_dividends_paid_on_common_stock.pdfIn PDF document text
    • https://cdn.sqhk.co/segidexu/iidvXhi/68612396645.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/wehdujj/62618253696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478923/normal_60235816a3f96.pdfIn PDF document text
    • https://sokuvefababadax.weebly.com/uploads/1/3/1/8/131856373/77ef369b791d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447267/normal_5ff17ba341846.pdfIn PDF document text
    • https://cdn.sqhk.co/rarinuva/fyrQDif/xerirejomunutolefibuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/iajajeL/minecraft_live_2020_mob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425916/normal_602d9269a4845.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosira/Thfghjd/mens_hairstyles_for_curly_hair.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481168/normal_6038020b3ac77.pdfIn macro / runtime command snippet
    • https://vizijupazikek.weebly.com/uploads/1/3/2/8/132814338/tomapoxo_kizir.pdfIn macro / runtime command snippet
    • https://paxexituva.weebly.com/uploads/1/3/5/3/135332474/8644219.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464313/normal_6030791e29d3d.pdfIn PDF document text
    • https://cdn.sqhk.co/fabunavaxa/AidjiAI/vufaximenuwafonewapuzom.pdfIn PDF document text
    • https://nodirodenesubob.weebly.com/uploads/1/3/5/9/135986245/3f42e6dcabacdf1.pdfIn PDF document text
    • http://surupumigo.mypressonline.com/treatment_manual_for_anorexia_nervosa_a_family_based_approach.pdfIn PDF document text
    • https://cdn.sqhk.co/nerenina/Rii1nxN/vibopunorowojegonume.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/easy_scientific_method_experiments_for_middle_school.pdfIn PDF document text
    • https://kijabejinal.weebly.com/uploads/1/3/0/9/130969506/3e83a9.pdfIn PDF document text
    • https://cdn.sqhk.co/sevalaturi/ibhbSha/naremib.pdfIn PDF document text
    • http://ruwufuwetoj.mygamesonline.org/75567313252.pdfIn PDF document text
    • http://lewimidofi.epizy.com/birirekaxuxakepasarodufas.pdfIn PDF document text
    • http://gevitejivojo.rf.gd/sedentarismo_2017.pdfIn PDF document text
    • http://wixudilasajigil.rf.gd/resumen_libro_ciudad_de_las_bestias.pdfIn PDF document text
    • http://pezamax.myartsonline.com/12123308555.pdfIn macro / runtime command snippet
    • http://fopagozijudiri.epizy.com/47223808442.pdfIn PDF document text
    • http://tiwojojerat.rf.gd/befikra_song_tiger_shroff_mp4.pdfIn PDF document text

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